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      "text" : "An update for bind is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
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      "text" : "The Berkeley Internet Name Domain (BIND) is an implementation of the Domain Name System (DNS) protocols. BIND includes a DNS server (named); a resolver library (routines for applications to use when interfacing with DNS); and tools for verifying that the DNS server is operating correctly.\n\nSecurity Fix(es):\n\n* bind: BIND 9 server memory exhaustion during GSS-API TKEY negotiation (CVE-2026-3039)\n\n* bind: BIND: Denial of Service via specially crafted DNS messages (CVE-2026-5946)\n\n* bind: bind9: DNSSEC Validation Bypass via Out-of-Zone NSEC Next Field (CVE-2026-13321)\n\n* bind: bind9: Potential memory usage beyond configured limits (CVE-2026-11622)\n\n* bind: bind9: Cache poisoning via label count discrepancy, RRSIG, wildcards (CVE-2026-11721)\n\n* bind: bind9: Unexpected exit with NSEC and NSEC3 both present (CVE-2026-13204)\n\n* bind: bind9: Incorrect acceptance of NSEC3 records (CVE-2026-10723)\n\n* bind9: bind: BIND 9: Denial of Service via 16-bit length truncation in DNS negative cache handling (CVE-2026-19667)\n\n* bind: BIND: Denial of Service via crafted DNSSEC reply (CVE-2026-80274)\n\n* bind: BIND: Denial of Service via malformed DNS64 responses (CVE-2026-19666)\n\n* bind: BIND: Denial of Service via unbounded processing of crafted DNS messages (CVE-2026-19630)\n\n* bind: bind: Arbitrary code execution via GSS-TSIG UDP message replay (CVE-2026-94300)\n\nBug Fix(es) and Enhancement(s):\n\n* bind: New root trust anchor key for DNSSEC (JIRA:RHEL-265349)\n\n* random named crashes on different RHEL 8.10 resolvers after of installing bind-9.11.36-16.el8_10.14 (RHSA-2026:54654) (JIRA:RHEL-300943)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
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    "ids" : [ {
      "system_name" : "Red Hat Bugzilla ID",
      "text" : "2479767"
    } ],
    "notes" : [ {
      "category" : "description",
      "text" : "A flaw was found in BIND. A remote attacker can exploit this vulnerability by sending maliciously-constructed packets to BIND servers configured for TKEY-based authentication via GSS-API (Generic Security Service Application Program Interface) tokens. This can lead to excessive memory consumption, resulting in a Denial of Service (DoS) for the affected server.",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "bind: BIND 9 server memory exhaustion during GSS-API TKEY negotiation",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "Important: BIND servers configured for TKEY-based GSS-API authentication are vulnerable to memory exhaustion when processing maliciously-constructed packets. This can lead to a denial of service, specifically impacting Red Hat deployments integrated with Active Directory or Kerberos for DNS where this authentication method is enabled.",
      "title" : "Statement"
    }, {
      "category" : "general",
      "text" : "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
    } ],
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    },
    "references" : [ {
      "category" : "self",
      "summary" : "Canonical URL",
      "url" : "https://access.redhat.com/security/cve/CVE-2026-3039"
    }, {
      "category" : "external",
      "summary" : "RHBZ#2479767",
      "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2479767"
    }, {
      "category" : "external",
      "summary" : "https://www.cve.org/CVERecord?id=CVE-2026-3039",
      "url" : "https://www.cve.org/CVERecord?id=CVE-2026-3039"
    }, {
      "category" : "external",
      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2026-3039",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-3039"
    } ],
    "release_date" : "2026-05-21T12:24:11.051000+00:00",
    "remediations" : [ {
      "category" : "vendor_fix",
      "date" : "2026-11-05T09:26:00+00:00",
      "details" : "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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      "restart_required" : {
        "category" : "none"
      },
      "url" : "https://access.redhat.com/errata/RHSA-2026:95477"
    }, {
      "category" : "workaround",
      "details" : "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.\n\nExample:\n```bash\n# Edit /etc/named.conf and remove or comment out lines related to tkey-gssapi-keytab or tkey-gssapi-credential.\n# For example, remove or comment out:\n# key \"gssapi-key\" {\n#     algorithm GSSAPI;\n#     secret \"BASE64_ENCODED_KEY\";\n# };\n#\n# Then reload the named service:\nsystemctl reload named\n```\nReloading the `named` service may cause a brief interruption in DNS resolution.",
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    "scores" : [ {
      "cvss_v3" : {
        "attackComplexity" : "LOW",
        "attackVector" : "NETWORK",
        "availabilityImpact" : "HIGH",
        "baseScore" : 7.5,
        "baseSeverity" : "HIGH",
        "confidentialityImpact" : "NONE",
        "integrityImpact" : "NONE",
        "privilegesRequired" : "NONE",
        "scope" : "UNCHANGED",
        "userInteraction" : "NONE",
        "vectorString" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
        "version" : "3.1"
      },
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    "threats" : [ {
      "category" : "impact",
      "details" : "Important"
    } ],
    "title" : "bind: BIND 9 server memory exhaustion during GSS-API TKEY negotiation"
  }, {
    "cve" : "CVE-2026-5946",
    "cwe" : {
      "id" : "CWE-1287",
      "name" : "Improper Validation of Specified Type of Input"
    },
    "discovery_date" : "2026-05-19T09:57:49.705000+00:00",
    "flags" : [ {
      "label" : "vulnerable_code_not_present",
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    } ],
    "ids" : [ {
      "system_name" : "Red Hat Bugzilla ID",
      "text" : "2479771"
    } ],
    "notes" : [ {
      "category" : "description",
      "text" : "A flaw was found in the bind component, specifically within the `named` daemon. This vulnerability allows a remote attacker to send specially crafted Domain Name System (DNS) messages. These messages, which use unusual classes or meta-classes, can trigger assertion failures in the `named` daemon when processed. Successful exploitation leads to an application level Denial of Service (DoS), making the DNS service unavailable.",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "bind: BIND: Denial of Service via specially crafted DNS messages",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "This is rated as an Important denial of service vulnerability. The `named` daemon is susceptible to crashes when processing specially crafted DNS messages that utilize non-Internet (IN) classes or meta-classes. This can lead to service unavailability if an attacker sends malicious requests targeting recursion, dynamic updates, zone change notifications, or specific record type processing.",
      "title" : "Statement"
    }, {
      "category" : "general",
      "text" : "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
    } ],
    "product_status" : {
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    "references" : [ {
      "category" : "self",
      "summary" : "Canonical URL",
      "url" : "https://access.redhat.com/security/cve/CVE-2026-5946"
    }, {
      "category" : "external",
      "summary" : "RHBZ#2479771",
      "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2479771"
    }, {
      "category" : "external",
      "summary" : "https://www.cve.org/CVERecord?id=CVE-2026-5946",
      "url" : "https://www.cve.org/CVERecord?id=CVE-2026-5946"
    }, {
      "category" : "external",
      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2026-5946",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-5946"
    } ],
    "release_date" : "2026-05-21T12:32:55.602000+00:00",
    "remediations" : [ {
      "category" : "vendor_fix",
      "date" : "2026-11-05T09:26:00+00:00",
      "details" : "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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        "category" : "none"
      },
      "url" : "https://access.redhat.com/errata/RHSA-2026:95477"
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    "scores" : [ {
      "cvss_v3" : {
        "attackComplexity" : "LOW",
        "attackVector" : "NETWORK",
        "availabilityImpact" : "HIGH",
        "baseScore" : 7.5,
        "baseSeverity" : "HIGH",
        "confidentialityImpact" : "NONE",
        "integrityImpact" : "NONE",
        "privilegesRequired" : "NONE",
        "scope" : "UNCHANGED",
        "userInteraction" : "NONE",
        "vectorString" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
        "version" : "3.1"
      },
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    "threats" : [ {
      "category" : "impact",
      "details" : "Important"
    } ],
    "title" : "bind: BIND: Denial of Service via specially crafted DNS messages"
  }, {
    "cve" : "CVE-2026-10723",
    "cwe" : {
      "id" : "CWE-345",
      "name" : "Insufficient Verification of Data Authenticity"
    },
    "discovery_date" : "2026-07-21T21:13:55.893000+00:00",
    "flags" : [ {
      "label" : "vulnerable_code_not_present",
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    } ],
    "ids" : [ {
      "system_name" : "Red Hat Bugzilla ID",
      "text" : "2504560"
    } ],
    "notes" : [ {
      "category" : "description",
      "text" : "BIND may accept incorrect child-zone NSEC3 records as valid, which could allow an attacker to forge authenticated NXDOMAIN responses.",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "bind: bind9: Incorrect acceptance of NSEC3 records",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "This Moderate flaw in BIND allows an attacker to forge authenticated NXDOMAIN responses for sibling zones due to incorrect validation of child-zone NSEC3 records. Exploitation requires high attack complexity, limiting the immediate risk to Red Hat products.",
      "title" : "Statement"
    }, {
      "category" : "general",
      "text" : "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
    } ],
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    "references" : [ {
      "category" : "self",
      "summary" : "Canonical URL",
      "url" : "https://access.redhat.com/security/cve/CVE-2026-10723"
    }, {
      "category" : "external",
      "summary" : "RHBZ#2504560",
      "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2504560"
    }, {
      "category" : "external",
      "summary" : "https://www.cve.org/CVERecord?id=CVE-2026-10723",
      "url" : "https://www.cve.org/CVERecord?id=CVE-2026-10723"
    }, {
      "category" : "external",
      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2026-10723",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-10723"
    } ],
    "release_date" : "2026-07-22T00:00:00+00:00",
    "remediations" : [ {
      "category" : "vendor_fix",
      "date" : "2026-11-05T09:26:00+00:00",
      "details" : "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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      "restart_required" : {
        "category" : "none"
      },
      "url" : "https://access.redhat.com/errata/RHSA-2026:95477"
    } ],
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      "cvss_v3" : {
        "attackComplexity" : "HIGH",
        "attackVector" : "NETWORK",
        "availabilityImpact" : "NONE",
        "baseScore" : 6.8,
        "baseSeverity" : "MEDIUM",
        "confidentialityImpact" : "NONE",
        "integrityImpact" : "HIGH",
        "privilegesRequired" : "NONE",
        "scope" : "CHANGED",
        "userInteraction" : "NONE",
        "vectorString" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N",
        "version" : "3.1"
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    "threats" : [ {
      "category" : "impact",
      "details" : "Moderate"
    } ],
    "title" : "bind: bind9: Incorrect acceptance of NSEC3 records"
  }, {
    "cve" : "CVE-2026-11622",
    "cwe" : {
      "id" : "CWE-400",
      "name" : "Uncontrolled Resource Consumption"
    },
    "discovery_date" : "2026-07-21T20:12:07.757000+00:00",
    "flags" : [ {
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    } ],
    "ids" : [ {
      "system_name" : "Red Hat Bugzilla ID",
      "text" : "2504298"
    } ],
    "notes" : [ {
      "category" : "description",
      "text" : "A DNSSEC validating resolver that is under a random subdomain attack against a DNSSEC-signed zone can suffer from runaway memory usage. The attacker needs to be able to send queries faster than the resolver can perform validation. The increased memory usage can be orders of magnitude beyond the limit configured in the max-cache-size parameter",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "bind: bind9: Potential memory usage beyond configured limits",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "This Important flaw in BIND's DNSSEC-validating resolver can lead to a denial of service. An attacker can trigger excessive memory usage by performing a random subdomain attack against a DNSSEC-signed zone, causing the resolver to exceed its `max-cache-size` limits. This is critical for Red Hat deployments where BIND is configured for DNSSEC validation and exposed to untrusted query sources.",
      "title" : "Statement"
    }, {
      "category" : "general",
      "text" : "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
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    "references" : [ {
      "category" : "self",
      "summary" : "Canonical URL",
      "url" : "https://access.redhat.com/security/cve/CVE-2026-11622"
    }, {
      "category" : "external",
      "summary" : "RHBZ#2504298",
      "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2504298"
    }, {
      "category" : "external",
      "summary" : "https://www.cve.org/CVERecord?id=CVE-2026-11622",
      "url" : "https://www.cve.org/CVERecord?id=CVE-2026-11622"
    }, {
      "category" : "external",
      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2026-11622",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-11622"
    } ],
    "release_date" : "2026-07-22T00:00:00+00:00",
    "remediations" : [ {
      "category" : "vendor_fix",
      "date" : "2026-11-05T09:26:00+00:00",
      "details" : "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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        "category" : "none"
      },
      "url" : "https://access.redhat.com/errata/RHSA-2026:95477"
    } ],
    "scores" : [ {
      "cvss_v3" : {
        "attackComplexity" : "LOW",
        "attackVector" : "NETWORK",
        "availabilityImpact" : "HIGH",
        "baseScore" : 7.5,
        "baseSeverity" : "HIGH",
        "confidentialityImpact" : "NONE",
        "integrityImpact" : "NONE",
        "privilegesRequired" : "NONE",
        "scope" : "UNCHANGED",
        "userInteraction" : "NONE",
        "vectorString" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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    "threats" : [ {
      "category" : "impact",
      "details" : "Important"
    } ],
    "title" : "bind: bind9: Potential memory usage beyond configured limits"
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    "cve" : "CVE-2026-11721",
    "cwe" : {
      "id" : "CWE-345",
      "name" : "Insufficient Verification of Data Authenticity"
    },
    "discovery_date" : "2026-07-21T20:22:21.905000+00:00",
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      "label" : "vulnerable_code_not_present",
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    } ],
    "ids" : [ {
      "system_name" : "Red Hat Bugzilla ID",
      "text" : "2504338"
    } ],
    "notes" : [ {
      "category" : "description",
      "text" : "It is possible for an attacker's zone to respond to a query with an RRSIG that has a smaller number of labels than the zone in which the RRSIG is contained. This causes named to produce a wildcard name for a zone that is shorter than the attacker's zone, which can result in cache poisoning. For this attack to have any effect, the resolver under attack must have set synth-from-dnssec yes; (which is the default).",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "bind: bind9: Cache poisoning via label count discrepancy, RRSIG, wildcards",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "Red Hat has evaluated this vulnerability as Important because a remote, unauthenticated attacker can poison the DNS resolver cache without prior privileges or user interaction, potentially spoofing records across the network. In Red Hat Enterprise Linux environments utilizing BIND as a recursive resolver, this condition is present under default settings. Authoritative-only configurations or isolated instances not performing recursive lookups for untrusted clients remain unaffected.",
      "title" : "Statement"
    }, {
      "category" : "general",
      "text" : "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
    } ],
    "product_status" : {
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    "references" : [ {
      "category" : "self",
      "summary" : "Canonical URL",
      "url" : "https://access.redhat.com/security/cve/CVE-2026-11721"
    }, {
      "category" : "external",
      "summary" : "RHBZ#2504338",
      "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2504338"
    }, {
      "category" : "external",
      "summary" : "https://www.cve.org/CVERecord?id=CVE-2026-11721",
      "url" : "https://www.cve.org/CVERecord?id=CVE-2026-11721"
    }, {
      "category" : "external",
      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2026-11721",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-11721"
    } ],
    "release_date" : "2026-07-22T00:00:00+00:00",
    "remediations" : [ {
      "category" : "vendor_fix",
      "date" : "2026-11-05T09:26:00+00:00",
      "details" : "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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      "restart_required" : {
        "category" : "none"
      },
      "url" : "https://access.redhat.com/errata/RHSA-2026:95477"
    } ],
    "scores" : [ {
      "cvss_v3" : {
        "attackComplexity" : "LOW",
        "attackVector" : "NETWORK",
        "availabilityImpact" : "NONE",
        "baseScore" : 7.5,
        "baseSeverity" : "HIGH",
        "confidentialityImpact" : "NONE",
        "integrityImpact" : "HIGH",
        "privilegesRequired" : "NONE",
        "scope" : "UNCHANGED",
        "userInteraction" : "NONE",
        "vectorString" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
        "version" : "3.1"
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    "threats" : [ {
      "category" : "impact",
      "details" : "Important"
    } ],
    "title" : "bind: bind9: Cache poisoning via label count discrepancy, RRSIG, wildcards"
  }, {
    "cve" : "CVE-2026-13204",
    "cwe" : {
      "id" : "CWE-617",
      "name" : "Reachable Assertion"
    },
    "discovery_date" : "2026-07-21T20:41:55.541000+00:00",
    "flags" : [ {
      "label" : "vulnerable_code_not_present",
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    } ],
    "ids" : [ {
      "system_name" : "Red Hat Bugzilla ID",
      "text" : "2504447"
    } ],
    "notes" : [ {
      "category" : "description",
      "text" : "If a provably insecure domain is covered by both an NSEC and NSEC3 record at the parent, and there exist an RRSIG for only one of these types, then BIND may exit unexpectedly with an assertion while validating this proof.",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "bind: bind9: Unexpected exit with NSEC and NSEC3 both present",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "This vulnerability is rated as Important because an unauthenticated remote attacker can trigger an abrupt service crash in BIND, resulting in a total denial of service for DNS resolution. In standard Red Hat Enterprise Linux deployments, recursive DNS servers have DNSSEC validation active by default, making them susceptible whenever resolving domains that present contradictory proof records. Systems operating solely as authoritative nameservers without recursion or DNSSEC validation are unaffected by this defect.",
      "title" : "Statement"
    }, {
      "category" : "general",
      "text" : "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
    } ],
    "product_status" : {
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    "references" : [ {
      "category" : "self",
      "summary" : "Canonical URL",
      "url" : "https://access.redhat.com/security/cve/CVE-2026-13204"
    }, {
      "category" : "external",
      "summary" : "RHBZ#2504447",
      "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2504447"
    }, {
      "category" : "external",
      "summary" : "https://www.cve.org/CVERecord?id=CVE-2026-13204",
      "url" : "https://www.cve.org/CVERecord?id=CVE-2026-13204"
    }, {
      "category" : "external",
      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2026-13204",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-13204"
    } ],
    "release_date" : "2026-07-22T00:00:00+00:00",
    "remediations" : [ {
      "category" : "vendor_fix",
      "date" : "2026-11-05T09:26:00+00:00",
      "details" : "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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      "restart_required" : {
        "category" : "none"
      },
      "url" : "https://access.redhat.com/errata/RHSA-2026:95477"
    } ],
    "scores" : [ {
      "cvss_v3" : {
        "attackComplexity" : "LOW",
        "attackVector" : "NETWORK",
        "availabilityImpact" : "HIGH",
        "baseScore" : 7.5,
        "baseSeverity" : "HIGH",
        "confidentialityImpact" : "NONE",
        "integrityImpact" : "NONE",
        "privilegesRequired" : "NONE",
        "scope" : "UNCHANGED",
        "userInteraction" : "NONE",
        "vectorString" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
        "version" : "3.1"
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    "threats" : [ {
      "category" : "impact",
      "details" : "Important"
    } ],
    "title" : "bind: bind9: Unexpected exit with NSEC and NSEC3 both present"
  }, {
    "cve" : "CVE-2026-13321",
    "cwe" : {
      "id" : "CWE-345",
      "name" : "Insufficient Verification of Data Authenticity"
    },
    "discovery_date" : "2026-07-21T19:40:30.464000+00:00",
    "flags" : [ {
      "label" : "vulnerable_code_not_present",
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    } ],
    "ids" : [ {
      "system_name" : "Red Hat Bugzilla ID",
      "text" : "2504166"
    } ],
    "notes" : [ {
      "category" : "description",
      "text" : "The BIND resolver accepts validly-signed NSEC records where the \"Next Domain Name\" field points outside the signer's zone.",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "bind: bind9: DNSSEC Validation Bypass via Out-of-Zone NSEC Next Field",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "An attacker controlling any DNSSEC-signed zone can craft NSEC records that span into victim zones, enabling cross-zone cache poisoning with authenticated denial-of-service responses (AD=1).",
      "title" : "Statement"
    }, {
      "category" : "general",
      "text" : "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
    } ],
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    },
    "references" : [ {
      "category" : "self",
      "summary" : "Canonical URL",
      "url" : "https://access.redhat.com/security/cve/CVE-2026-13321"
    }, {
      "category" : "external",
      "summary" : "RHBZ#2504166",
      "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2504166"
    }, {
      "category" : "external",
      "summary" : "https://www.cve.org/CVERecord?id=CVE-2026-13321",
      "url" : "https://www.cve.org/CVERecord?id=CVE-2026-13321"
    }, {
      "category" : "external",
      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2026-13321",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-13321"
    } ],
    "release_date" : "2026-07-22T00:00:00+00:00",
    "remediations" : [ {
      "category" : "vendor_fix",
      "date" : "2026-11-05T09:26:00+00:00",
      "details" : "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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      "restart_required" : {
        "category" : "none"
      },
      "url" : "https://access.redhat.com/errata/RHSA-2026:95477"
    }, {
      "category" : "workaround",
      "details" : "Disclaimer: The following mitigation notes are provided as a courtesy, pending the application of an official patch. This content was generated utilizing AI tools in conjunction with data from cmetaxonomy.org. Customers are advised to independently evaluate and test these temporary mitigations within their own infrastructure.\n\nISC states no workarounds exist. Until patched, restrict the resolver to authorized client networks and deploy separate resolvers per trust zone. Memory hardening and auth controls don't apply — this is a DNS protocol logic error using validly-signed records.",
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    "scores" : [ {
      "cvss_v3" : {
        "attackComplexity" : "LOW",
        "attackVector" : "NETWORK",
        "availabilityImpact" : "NONE",
        "baseScore" : 8.6,
        "baseSeverity" : "HIGH",
        "confidentialityImpact" : "NONE",
        "integrityImpact" : "HIGH",
        "privilegesRequired" : "NONE",
        "scope" : "CHANGED",
        "userInteraction" : "NONE",
        "vectorString" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N",
        "version" : "3.1"
      },
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    "threats" : [ {
      "category" : "impact",
      "details" : "Important"
    } ],
    "title" : "bind: bind9: DNSSEC Validation Bypass via Out-of-Zone NSEC Next Field"
  }, {
    "cve" : "CVE-2026-19630",
    "cwe" : {
      "id" : "CWE-770",
      "name" : "Allocation of Resources Without Limits or Throttling"
    },
    "discovery_date" : "2026-10-20T19:42:24.891000+00:00",
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    } ],
    "ids" : [ {
      "system_name" : "Red Hat Bugzilla ID",
      "text" : "2556406"
    } ],
    "notes" : [ {
      "category" : "description",
      "text" : "A flaw was found in BIND. A remote attacker can exploit this vulnerability by sending specially crafted Domain Name System (DNS) protocol messages containing an excessive number of specific structures. Because BIND does not impose a limit on processing these structures, handling the malicious request consumes disproportionate amounts of CPU time and memory, resulting in a Denial of Service (DoS).",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "bind: BIND: Denial of Service via unbounded processing of crafted DNS messages",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "This vulnerability is rated as an Important severity flaw because an unauthenticated remote attacker can exhaust server CPU and memory resources without requiring privileges, resulting in a denial of service. In Red Hat Enterprise Linux and OpenShift environments, the risk primarily affects BIND instances functioning as recursive resolvers exposed to untrusted traffic. Deployments serving strictly authoritative roles or those isolated from untrusted client queries experience significantly lower exposure to this attack vector.",
      "title" : "Statement"
    }, {
      "category" : "general",
      "text" : "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
    } ],
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    "references" : [ {
      "category" : "self",
      "summary" : "Canonical URL",
      "url" : "https://access.redhat.com/security/cve/CVE-2026-19630"
    }, {
      "category" : "external",
      "summary" : "RHBZ#2556406",
      "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2556406"
    }, {
      "category" : "external",
      "summary" : "https://www.cve.org/CVERecord?id=CVE-2026-19630",
      "url" : "https://www.cve.org/CVERecord?id=CVE-2026-19630"
    }, {
      "category" : "external",
      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2026-19630",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-19630"
    }, {
      "category" : "external",
      "summary" : "https://kb.isc.org/docs/cve-2026-19630",
      "url" : "https://kb.isc.org/docs/cve-2026-19630"
    } ],
    "release_date" : "2026-10-21T00:00:00+00:00",
    "remediations" : [ {
      "category" : "vendor_fix",
      "date" : "2026-11-05T09:26:00+00:00",
      "details" : "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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        "category" : "none"
      },
      "url" : "https://access.redhat.com/errata/RHSA-2026:95477"
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      "cvss_v3" : {
        "attackComplexity" : "LOW",
        "attackVector" : "NETWORK",
        "availabilityImpact" : "HIGH",
        "baseScore" : 7.5,
        "baseSeverity" : "HIGH",
        "confidentialityImpact" : "NONE",
        "integrityImpact" : "NONE",
        "privilegesRequired" : "NONE",
        "scope" : "UNCHANGED",
        "userInteraction" : "NONE",
        "vectorString" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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    "threats" : [ {
      "category" : "impact",
      "details" : "Important"
    } ],
    "title" : "bind: BIND: Denial of Service via unbounded processing of crafted DNS messages"
  }, {
    "cve" : "CVE-2026-19666",
    "cwe" : {
      "id" : "CWE-617",
      "name" : "Reachable Assertion"
    },
    "discovery_date" : "2026-09-16T14:34:53.189451+00:00",
    "flags" : [ {
      "label" : "vulnerable_code_not_present",
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    } ],
    "ids" : [ {
      "system_name" : "Red Hat Bugzilla ID",
      "text" : "2535477"
    } ],
    "notes" : [ {
      "category" : "description",
      "text" : "A flaw was found in BIND. When a resolver is configured to use DNS64, a specially crafted, malformed answer from an authoritative server can cause the `named` process to exit unexpectedly. This can lead to a Denial of Service (DoS) for clients relying on the affected resolver.",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "bind: BIND: Denial of Service via malformed DNS64 responses",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "Important: This denial of service vulnerability affects BIND resolvers configured to use the `dns64` feature. A specially crafted malformed DNS64 response from an authoritative server can cause the `named` process to unexpectedly terminate, leading to service unavailability. Exploitation requires the `dns64` feature to be explicitly enabled in the resolver's configuration.",
      "title" : "Statement"
    }, {
      "category" : "general",
      "text" : "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
    } ],
    "product_status" : {
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    "references" : [ {
      "category" : "self",
      "summary" : "Canonical URL",
      "url" : "https://access.redhat.com/security/cve/CVE-2026-19666"
    }, {
      "category" : "external",
      "summary" : "RHBZ#2535477",
      "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2535477"
    }, {
      "category" : "external",
      "summary" : "https://www.cve.org/CVERecord?id=CVE-2026-19666",
      "url" : "https://www.cve.org/CVERecord?id=CVE-2026-19666"
    }, {
      "category" : "external",
      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2026-19666",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-19666"
    }, {
      "category" : "external",
      "summary" : "https://downloads.isc.org/isc/bind9/9.20.29",
      "url" : "https://downloads.isc.org/isc/bind9/9.20.29"
    }, {
      "category" : "external",
      "summary" : "https://downloads.isc.org/isc/bind9/9.21.26",
      "url" : "https://downloads.isc.org/isc/bind9/9.21.26"
    }, {
      "category" : "external",
      "summary" : "https://kb.isc.org/docs/cve-2026-19666",
      "url" : "https://kb.isc.org/docs/cve-2026-19666"
    } ],
    "release_date" : "2026-09-16T14:02:30.453000+00:00",
    "remediations" : [ {
      "category" : "vendor_fix",
      "date" : "2026-11-05T09:26:00+00:00",
      "details" : "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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      "restart_required" : {
        "category" : "none"
      },
      "url" : "https://access.redhat.com/errata/RHSA-2026:95477"
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    "scores" : [ {
      "cvss_v3" : {
        "attackComplexity" : "LOW",
        "attackVector" : "NETWORK",
        "availabilityImpact" : "HIGH",
        "baseScore" : 7.5,
        "baseSeverity" : "HIGH",
        "confidentialityImpact" : "NONE",
        "integrityImpact" : "NONE",
        "privilegesRequired" : "NONE",
        "scope" : "UNCHANGED",
        "userInteraction" : "NONE",
        "vectorString" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
        "version" : "3.1"
      },
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    "threats" : [ {
      "category" : "impact",
      "details" : "Important"
    } ],
    "title" : "bind: BIND: Denial of Service via malformed DNS64 responses"
  }, {
    "cve" : "CVE-2026-19667",
    "cwe" : {
      "id" : "CWE-190",
      "name" : "Integer Overflow or Wraparound"
    },
    "discovery_date" : "2026-09-16T00:00:00+00:00",
    "flags" : [ {
      "label" : "vulnerable_code_not_present",
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    } ],
    "ids" : [ {
      "system_name" : "Red Hat Bugzilla ID",
      "text" : "2535435"
    } ],
    "notes" : [ {
      "category" : "description",
      "text" : "A flaw was found in `bind9`'s `named` component. A remote attacker, by sending a specially crafted DNS negative answer of exactly 65536 bytes from an authoritative server, can cause a 16-bit length truncation. This results in a zero-byte negative cache entry. When `named` attempts to read this invalid entry, it will unexpectedly terminate, leading to a Denial of Service (DoS).",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "bind9: bind: BIND 9: Denial of Service via 16-bit length truncation in DNS negative cache handling",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "This is an Important denial of service flaw in BIND 9's `named` service. An attacker-controlled authoritative server can trigger a `named` abort by sending a precisely sized negative DNS answer. This vulnerability primarily affects BIND instances configured as recursive resolvers that query untrusted authoritative servers, leading to service disruption.",
      "title" : "Statement"
    }, {
      "category" : "general",
      "text" : "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
    } ],
    "product_status" : {
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    "references" : [ {
      "category" : "self",
      "summary" : "Canonical URL",
      "url" : "https://access.redhat.com/security/cve/CVE-2026-19667"
    }, {
      "category" : "external",
      "summary" : "RHBZ#2535435",
      "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2535435"
    }, {
      "category" : "external",
      "summary" : "https://www.cve.org/CVERecord?id=CVE-2026-19667",
      "url" : "https://www.cve.org/CVERecord?id=CVE-2026-19667"
    }, {
      "category" : "external",
      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2026-19667",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-19667"
    }, {
      "category" : "external",
      "summary" : "https://downloads.isc.org/isc/bind9/9.20.29",
      "url" : "https://downloads.isc.org/isc/bind9/9.20.29"
    }, {
      "category" : "external",
      "summary" : "https://downloads.isc.org/isc/bind9/9.21.26",
      "url" : "https://downloads.isc.org/isc/bind9/9.21.26"
    }, {
      "category" : "external",
      "summary" : "https://kb.isc.org/docs/cve-2026-19667",
      "url" : "https://kb.isc.org/docs/cve-2026-19667"
    } ],
    "release_date" : "2026-09-16T13:46:56.783000+00:00",
    "remediations" : [ {
      "category" : "vendor_fix",
      "date" : "2026-11-05T09:26:00+00:00",
      "details" : "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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      "restart_required" : {
        "category" : "none"
      },
      "url" : "https://access.redhat.com/errata/RHSA-2026:95477"
    }, {
      "category" : "workaround",
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    "scores" : [ {
      "cvss_v3" : {
        "attackComplexity" : "LOW",
        "attackVector" : "NETWORK",
        "availabilityImpact" : "HIGH",
        "baseScore" : 7.5,
        "baseSeverity" : "HIGH",
        "confidentialityImpact" : "NONE",
        "integrityImpact" : "NONE",
        "privilegesRequired" : "NONE",
        "scope" : "UNCHANGED",
        "userInteraction" : "NONE",
        "vectorString" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
        "version" : "3.1"
      },
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    "threats" : [ {
      "category" : "impact",
      "details" : "Important"
    } ],
    "title" : "bind9: bind: BIND 9: Denial of Service via 16-bit length truncation in DNS negative cache handling"
  }, {
    "cve" : "CVE-2026-80274",
    "cwe" : {
      "id" : "CWE-617",
      "name" : "Reachable Assertion"
    },
    "discovery_date" : "2026-09-16T14:31:05.646441+00:00",
    "flags" : [ {
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    } ],
    "ids" : [ {
      "system_name" : "Red Hat Bugzilla ID",
      "text" : "2535466"
    } ],
    "notes" : [ {
      "category" : "description",
      "text" : "A flaw was found in BIND. A remote attacker, by sending a specially crafted DNSSEC-signed authoritative zone reply, can trigger an unexpected program exit in the validating resolver. This can lead to a Denial of Service (DoS) for the affected BIND resolver.",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "bind: BIND: Denial of Service via crafted DNSSEC reply",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "This is an Important denial of service vulnerability in BIND resolvers. When DNSSEC validation is enabled, a specially crafted DNSSEC reply from an authoritative server can cause the BIND resolver to unexpectedly exit, leading to a disruption of DNS resolution services. This impacts the availability of DNS resolution on affected Red Hat systems configured with DNSSEC.",
      "title" : "Statement"
    }, {
      "category" : "general",
      "text" : "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
    } ],
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    "references" : [ {
      "category" : "self",
      "summary" : "Canonical URL",
      "url" : "https://access.redhat.com/security/cve/CVE-2026-80274"
    }, {
      "category" : "external",
      "summary" : "RHBZ#2535466",
      "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2535466"
    }, {
      "category" : "external",
      "summary" : "https://www.cve.org/CVERecord?id=CVE-2026-80274",
      "url" : "https://www.cve.org/CVERecord?id=CVE-2026-80274"
    }, {
      "category" : "external",
      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2026-80274",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-80274"
    }, {
      "category" : "external",
      "summary" : "https://downloads.isc.org/isc/bind9/9.20.29",
      "url" : "https://downloads.isc.org/isc/bind9/9.20.29"
    }, {
      "category" : "external",
      "summary" : "https://downloads.isc.org/isc/bind9/9.21.26",
      "url" : "https://downloads.isc.org/isc/bind9/9.21.26"
    }, {
      "category" : "external",
      "summary" : "https://kb.isc.org/docs/cve-2026-80274",
      "url" : "https://kb.isc.org/docs/cve-2026-80274"
    } ],
    "release_date" : "2026-09-16T14:07:20.058000+00:00",
    "remediations" : [ {
      "category" : "vendor_fix",
      "date" : "2026-11-05T09:26:00+00:00",
      "details" : "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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      "restart_required" : {
        "category" : "none"
      },
      "url" : "https://access.redhat.com/errata/RHSA-2026:95477"
    }, {
      "category" : "workaround",
      "details" : "To mitigate this issue, disable DNSSEC validation in the BIND resolver configuration. This can be achieved by setting `dnssec-enable no;` and `dnssec-validation no;` within the `options` block in `named.conf` or an included configuration file. A restart of the `named` service is required for the changes to take effect and may impact DNS resolution during the restart. Disabling DNSSEC validation will reduce the security posture of DNS resolution by removing integrity protection for DNS data.",
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    "scores" : [ {
      "cvss_v3" : {
        "attackComplexity" : "LOW",
        "attackVector" : "NETWORK",
        "availabilityImpact" : "HIGH",
        "baseScore" : 7.5,
        "baseSeverity" : "HIGH",
        "confidentialityImpact" : "NONE",
        "integrityImpact" : "NONE",
        "privilegesRequired" : "NONE",
        "scope" : "UNCHANGED",
        "userInteraction" : "NONE",
        "vectorString" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
        "version" : "3.1"
      },
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    "threats" : [ {
      "category" : "impact",
      "details" : "Important"
    } ],
    "title" : "bind: BIND: Denial of Service via crafted DNSSEC reply"
  }, {
    "cve" : "CVE-2026-94300",
    "cwe" : {
      "id" : "CWE-366",
      "name" : "Race Condition within a Thread"
    },
    "discovery_date" : "2026-10-20T19:46:35.830000+00:00",
    "flags" : [ {
      "label" : "vulnerable_code_not_present",
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    } ],
    "ids" : [ {
      "system_name" : "Red Hat Bugzilla ID",
      "text" : "2556407"
    } ],
    "notes" : [ {
      "category" : "description",
      "text" : "A flaw was found in BIND. This vulnerability may allow a remote attacker to achieve arbitrary code execution on the target server. An attacker who captures a valid User Datagram Protocol (UDP) message signed with Generic Security Service Transaction Signature (GSS-TSIG) can replay it while the negotiated key is active. When combined with crafted queries directed to an attacker-controlled DNS zone, this triggers memory corruption in the named service.",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "bind: bind: Arbitrary code execution via GSS-TSIG UDP message replay",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "Red Hat Product Security has rated this vulnerability as Important rather than Critical because, while remote unauthenticated code execution is possible, exploitation depends on capturing active cryptographic keys within their validity window and orchestrating complex concurrent requests. In standard Red Hat Enterprise Linux deployments, the BIND daemon does not enable GSS-TSIG by default, restricting risk primarily to servers integrated with Kerberos-based identity infrastructure like FreeIPA or Active Directory. Deployments that do not negotiate GSS-TSIG keys or that strictly limit dynamic DNS access to trusted networks remain unexposed to this attack vector.",
      "title" : "Statement"
    }, {
      "category" : "general",
      "text" : "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
    } ],
    "product_status" : {
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    },
    "references" : [ {
      "category" : "self",
      "summary" : "Canonical URL",
      "url" : "https://access.redhat.com/security/cve/CVE-2026-94300"
    }, {
      "category" : "external",
      "summary" : "RHBZ#2556407",
      "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2556407"
    }, {
      "category" : "external",
      "summary" : "https://www.cve.org/CVERecord?id=CVE-2026-94300",
      "url" : "https://www.cve.org/CVERecord?id=CVE-2026-94300"
    }, {
      "category" : "external",
      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2026-94300",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-94300"
    }, {
      "category" : "external",
      "summary" : "https://kb.isc.org/docs/cve-2026-94300",
      "url" : "https://kb.isc.org/docs/cve-2026-94300"
    } ],
    "release_date" : "2026-10-21T00:00:00+00:00",
    "remediations" : [ {
      "category" : "vendor_fix",
      "date" : "2026-11-05T09:26:00+00:00",
      "details" : "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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      "restart_required" : {
        "category" : "none"
      },
      "url" : "https://access.redhat.com/errata/RHSA-2026:95477"
    }, {
      "category" : "workaround",
      "details" : "Disable GSS-TSIG in the BIND configuration if Kerberos-authenticated dynamic DNS functionality is not required, or restrict network access to the DNS service using firewall controls.\n\nTo disable GSS-TSIG, comment out or remove the `tkey-gssapi-keytab` and `tkey-gssapi-credential` directives within `/etc/named.conf` (and any referenced include files), then restart the service:\n\nsystemctl restart named\n\nIf operating named inside a chroot environment, execute:\n\nsystemctl restart named-chroot\n\nAlternatively, restrict UDP and TCP traffic on port 53 to trusted network segments using host or network firewalls to block untrusted external access.\n\nCaveats: Disabling GSS-TSIG prevents clients from performing Kerberos-authenticated dynamic DNS modifications, which may disrupt environments relying on automated Active Directory or Identity Management (IdM) enrollment.\nWarning: Restarting the BIND service will momentarily interrupt active DNS query processing and domain name resolution for dependent network clients.",
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    "scores" : [ {
      "cvss_v3" : {
        "attackComplexity" : "HIGH",
        "attackVector" : "NETWORK",
        "availabilityImpact" : "HIGH",
        "baseScore" : 8.1,
        "baseSeverity" : "HIGH",
        "confidentialityImpact" : "HIGH",
        "integrityImpact" : "HIGH",
        "privilegesRequired" : "NONE",
        "scope" : "UNCHANGED",
        "userInteraction" : "NONE",
        "vectorString" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "version" : "3.1"
      },
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    } ],
    "threats" : [ {
      "category" : "impact",
      "details" : "Important"
    } ],
    "title" : "bind: bind: Arbitrary code execution via GSS-TSIG UDP message replay"
  } ]
}