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      "text" : "This is a kernel live patch module which can be loaded by the kpatch command line utility to modify the code of a running kernel.  This patch module is targeted for kernel-5.14.0-284.134.1.el9_2.\n\nSecurity Fix(es):\n\n* kernel: ipc: limit next_id allocation to the valid ID range (CVE-2026-52923)\n\n* kernel: udp: fix potential use-after-free in tunnel segmentation (CVE-2026-74705)\n\n* kernel: net: tun: bound receive headroom (CVE-2026-81000)\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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      "category" : "summary",
      "text" : "kernel: ipc: limit next_id allocation to the valid ID range",
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      "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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      "details" : "Important"
    } ],
    "title" : "kernel: ipc: limit next_id allocation to the valid ID range"
  }, {
    "cve" : "CVE-2026-74705",
    "cwe" : {
      "id" : "CWE-416",
      "name" : "Use After Free"
    },
    "discovery_date" : "2026-08-22T00:00:00+00:00",
    "ids" : [ {
      "system_name" : "Red Hat Bugzilla ID",
      "text" : "2521498"
    } ],
    "notes" : [ {
      "category" : "description",
      "text" : "A flaw was found in the Linux kernel's UDP (User Datagram Protocol) tunnel segmentation. This vulnerability arises when the system attempts to process network packets, specifically in the __skb_udp_tunnel_segment() function. An attacker could potentially exploit a use-after-free condition, where the system attempts to use memory that has already been released, leading to system instability or potentially arbitrary code execution.",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "kernel: udp: fix potential use-after-free in tunnel segmentation",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "This vulnerability is rated as Important severity because it could enable a remote attacker to trigger memory corruption, resulting in a kernel panic or potential arbitrary code execution. Red Hat Enterprise Linux environments running virtualized or containerized network overlays, such as VXLAN or Geneve, process encapsulated traffic and are susceptible to this flaw during packet segmentation offloading. Standard network configurations that do not employ UDP tunnel encapsulation protocols are unlikely to be vulnerable.",
      "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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      "summary" : "Canonical URL",
      "url" : "https://access.redhat.com/security/cve/CVE-2026-74705"
    }, {
      "category" : "external",
      "summary" : "RHBZ#2521498",
      "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2521498"
    }, {
      "category" : "external",
      "summary" : "https://www.cve.org/CVERecord?id=CVE-2026-74705",
      "url" : "https://www.cve.org/CVERecord?id=CVE-2026-74705"
    }, {
      "category" : "external",
      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2026-74705",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-74705"
    }, {
      "category" : "external",
      "summary" : "https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-74705.mbox",
      "url" : "https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-74705.mbox"
    } ],
    "release_date" : "2026-08-22T00:00:00+00:00",
    "remediations" : [ {
      "category" : "vendor_fix",
      "date" : "2026-11-05T17:25:12+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"
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        "confidentialityImpact" : "HIGH",
        "integrityImpact" : "HIGH",
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        "scope" : "UNCHANGED",
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      "details" : "Important"
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    "title" : "kernel: udp: fix potential use-after-free in tunnel segmentation"
  }, {
    "cve" : "CVE-2026-81000",
    "cwe" : {
      "id" : "CWE-787",
      "name" : "Out-of-bounds Write"
    },
    "discovery_date" : "2026-09-11T00:00:00+00:00",
    "ids" : [ {
      "system_name" : "Red Hat Bugzilla ID",
      "text" : "2532176"
    } ],
    "notes" : [ {
      "category" : "description",
      "text" : "A flaw was found in the Linux kernel's TUN/TAP driver. An integer underflow vulnerability exists in the tun_get_user() function when processing oversized headroom requests. This can occur if Open vSwitch (OVS) propagates an excessively large headroom request to the TUN or TAP device. Successful exploitation could lead to memory corruption, where network packet data is written outside its intended buffer, potentially causing a denial of service or other system instability.",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "kernel: net: tun: bound receive headroom",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "Red Hat rates this vulnerability as Important because an attacker with local access or control over virtualized network traffic can trigger out-of-bounds kernel memory writes, potentially achieving system compromise or causing an immediate kernel panic. In typical enterprise environments, virtual network interfaces such as TUN and TAP are widely leveraged alongside software-defined networking and hypervisors. Although untrusted remote callers cannot directly reach these interfaces on default installations, the risk of kernel memory corruption from unprivileged local contexts or container boundaries justifies this rating.",
      "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-2026-81000"
    }, {
      "category" : "external",
      "summary" : "RHBZ#2532176",
      "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2532176"
    }, {
      "category" : "external",
      "summary" : "RHSB-2026-011",
      "url" : "https://access.redhat.com/security/vulnerabilities/RHSB-2026-011"
    }, {
      "category" : "external",
      "summary" : "https://www.cve.org/CVERecord?id=CVE-2026-81000",
      "url" : "https://www.cve.org/CVERecord?id=CVE-2026-81000"
    }, {
      "category" : "external",
      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2026-81000",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-81000"
    }, {
      "category" : "external",
      "summary" : "https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-81000.mbox",
      "url" : "https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-81000.mbox"
    } ],
    "release_date" : "2026-09-11T00:00:00+00:00",
    "remediations" : [ {
      "category" : "vendor_fix",
      "date" : "2026-11-05T17:25:12+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"
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      "url" : "https://access.redhat.com/errata/RHSA-2026:95600"
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        "baseScore" : 7.8,
        "baseSeverity" : "HIGH",
        "confidentialityImpact" : "HIGH",
        "integrityImpact" : "HIGH",
        "privilegesRequired" : "LOW",
        "scope" : "UNCHANGED",
        "userInteraction" : "NONE",
        "vectorString" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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    "threats" : [ {
      "category" : "impact",
      "details" : "Important"
    } ],
    "title" : "kernel: net: tun: bound receive headroom"
  } ]
}