{
  "document" : {
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      "text" : "Important"
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    "category" : "csaf_security_advisory",
    "csaf_version" : "2.0",
    "distribution" : {
      "text" : "Copyright © Red Hat, Inc. All rights reserved.",
      "tlp" : {
        "label" : "WHITE",
        "url" : "https://www.first.org/tlp/"
      }
    },
    "lang" : "en",
    "notes" : [ {
      "category" : "summary",
      "text" : "An update for Red Hat Hardened Images RPMs is now available.",
      "title" : "Topic"
    }, {
      "category" : "general",
      "text" : "This update includes the following RPMs:\n\nvalkey:\n  * valkey-9.0.3-1.2.hum1 (aarch64, x86_64)\n  * valkey-compat-redis-9.0.3-1.2.hum1 (noarch)\n  * valkey-compat-redis-devel-9.0.3-1.2.hum1 (noarch)\n  * valkey-devel-9.0.3-1.2.hum1 (aarch64, x86_64)\n  * valkey-doc-9.0.3-1.2.hum1 (noarch)\n  * valkey-rdma-9.0.3-1.2.hum1 (aarch64, x86_64)\n  * valkey-9.0.3-1.2.hum1.src (src)",
      "title" : "Details"
    }, {
      "category" : "legal_disclaimer",
      "text" : "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
      "title" : "Terms of Use"
    } ],
    "publisher" : {
      "category" : "vendor",
      "contact_details" : "https://access.redhat.com/security/team/contact/",
      "issuing_authority" : "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.",
      "name" : "Red Hat Product Security",
      "namespace" : "https://www.redhat.com"
    },
    "references" : [ {
      "category" : "self",
      "summary" : "https://access.redhat.com/errata/RHSA-2026:8753",
      "url" : "https://access.redhat.com/errata/RHSA-2026:8753"
    }, {
      "category" : "external",
      "summary" : "https://images.redhat.com/",
      "url" : "https://images.redhat.com/"
    }, {
      "category" : "external",
      "summary" : "https://access.redhat.com/security/cve/CVE-2026-21863",
      "url" : "https://access.redhat.com/security/cve/CVE-2026-21863"
    }, {
      "category" : "external",
      "summary" : "https://access.redhat.com/security/updates/classification/",
      "url" : "https://access.redhat.com/security/updates/classification/"
    }, {
      "category" : "self",
      "summary" : "Canonical URL",
      "url" : "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_8753.json"
    } ],
    "title" : "Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update",
    "tracking" : {
      "current_release_date" : "2026-04-20T21:35:33+00:00",
      "generator" : {
        "date" : "2026-04-20T21:35:33+00:00",
        "engine" : {
          "name" : "Red Hat SDEngine",
          "version" : "4.7.5"
        }
      },
      "id" : "RHSA-2026:8753",
      "initial_release_date" : "2026-04-17T11:29:33+00:00",
      "revision_history" : [ {
        "date" : "2026-04-17T11:29:33+00:00",
        "number" : "1",
        "summary" : "Initial version"
      }, {
        "date" : "2026-04-20T11:28:34+00:00",
        "number" : "2",
        "summary" : "Last updated version"
      }, {
        "date" : "2026-04-20T21:35:33+00:00",
        "number" : "3",
        "summary" : "Last generated version"
      } ],
      "status" : "final",
      "version" : "3"
    }
  },
  "product_tree" : {
    "branches" : [ {
      "branches" : [ {
        "branches" : [ {
          "category" : "product_name",
          "name" : "Red Hat Hardened Images",
          "product" : {
            "name" : "Red Hat Hardened Images",
            "product_id" : "Red Hat Hardened Images",
            "product_identification_helper" : {
              "cpe" : "cpe:/a:redhat:hummingbird:1"
            }
          }
        } ],
        "category" : "product_family",
        "name" : "Red Hat Hardened Images"
      }, {
        "branches" : [ {
          "category" : "product_version",
          "name" : "valkey-main@aarch64",
          "product" : {
            "name" : "valkey-main@aarch64",
            "product_id" : "valkey-main@aarch64",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/valkey@9.0.3-1.2.hum1?arch=aarch64&distro=hummingbird-20251124&repository_id=public-hummingbird-aarch64-rpms"
            }
          }
        } ],
        "category" : "architecture",
        "name" : "aarch64"
      }, {
        "branches" : [ {
          "category" : "product_version",
          "name" : "valkey-main@src",
          "product" : {
            "name" : "valkey-main@src",
            "product_id" : "valkey-main@src",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/valkey@9.0.3-1.2.hum1?arch=src&distro=hummingbird-20251124&repository_id=public-hummingbird-source-rpms"
            }
          }
        } ],
        "category" : "architecture",
        "name" : "src"
      }, {
        "branches" : [ {
          "category" : "product_version",
          "name" : "valkey-main@x86_64",
          "product" : {
            "name" : "valkey-main@x86_64",
            "product_id" : "valkey-main@x86_64",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/valkey@9.0.3-1.2.hum1?arch=x86_64&distro=hummingbird-20251124&repository_id=public-hummingbird-x86_64-rpms"
            }
          }
        } ],
        "category" : "architecture",
        "name" : "x86_64"
      }, {
        "branches" : [ {
          "category" : "product_version",
          "name" : "valkey-main@noarch",
          "product" : {
            "name" : "valkey-main@noarch",
            "product_id" : "valkey-main@noarch",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/valkey-compat-redis@9.0.3-1.2.hum1?arch=noarch&distro=hummingbird-20251124&repository_id=public-hummingbird-x86_64-rpms"
            }
          }
        } ],
        "category" : "architecture",
        "name" : "noarch"
      } ],
      "category" : "vendor",
      "name" : "Red Hat"
    } ],
    "relationships" : [ {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "valkey-main@aarch64 as a component of Red Hat Hardened Images",
        "product_id" : "Red Hat Hardened Images:valkey-main@aarch64"
      },
      "product_reference" : "valkey-main@aarch64",
      "relates_to_product_reference" : "Red Hat Hardened Images"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "valkey-main@noarch as a component of Red Hat Hardened Images",
        "product_id" : "Red Hat Hardened Images:valkey-main@noarch"
      },
      "product_reference" : "valkey-main@noarch",
      "relates_to_product_reference" : "Red Hat Hardened Images"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "valkey-main@src as a component of Red Hat Hardened Images",
        "product_id" : "Red Hat Hardened Images:valkey-main@src"
      },
      "product_reference" : "valkey-main@src",
      "relates_to_product_reference" : "Red Hat Hardened Images"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "valkey-main@x86_64 as a component of Red Hat Hardened Images",
        "product_id" : "Red Hat Hardened Images:valkey-main@x86_64"
      },
      "product_reference" : "valkey-main@x86_64",
      "relates_to_product_reference" : "Red Hat Hardened Images"
    } ]
  },
  "vulnerabilities" : [ {
    "cve" : "CVE-2026-21863",
    "cwe" : {
      "id" : "CWE-125",
      "name" : "Out-of-bounds Read"
    },
    "discovery_date" : "2026-02-23T21:03:12.281522+00:00",
    "ids" : [ {
      "system_name" : "Red Hat Bugzilla ID",
      "text" : "2442026"
    } ],
    "notes" : [ {
      "category" : "description",
      "text" : "A flaw was found in Valkey, a distributed key-value database. A malicious actor with access to the Valkey clusterbus port can exploit an input validation vulnerability by sending a specially crafted invalid clusterbus packet. This lack of validation for clusterbus ping extension packets can lead to an out-of-bounds read. Consequently, this may cause the system to crash, resulting in a Denial of Service (DoS).",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "valkey: Valkey: Denial of Service via invalid clusterbus packet",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "This issue is rated High severity by Red Hat Product Security, because Valkey is commonly deployed as a network-accessible service or embedded within applications that accept remote input over standard network interfaces. In such environments, a remote attacker can trigger the vulnerability by sending specially crafted data to the service. Successful exploitation results in a service crash, leading to a denial-of-service condition. Although no confidentiality or integrity impacts are observed, the ability to repeatedly crash the service over the network justifies a High availability impact rating.\n\nThis vulnerability affects Valkey deployments where the cluster bus connection is exposed.",
      "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" : {
      "fixed" : [ "Red Hat Hardened Images:valkey-main@aarch64", "Red Hat Hardened Images:valkey-main@noarch", "Red Hat Hardened Images:valkey-main@src", "Red Hat Hardened Images:valkey-main@x86_64" ]
    },
    "references" : [ {
      "category" : "self",
      "summary" : "Canonical URL",
      "url" : "https://access.redhat.com/security/cve/CVE-2026-21863"
    }, {
      "category" : "external",
      "summary" : "RHBZ#2442026",
      "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2442026"
    }, {
      "category" : "external",
      "summary" : "https://www.cve.org/CVERecord?id=CVE-2026-21863",
      "url" : "https://www.cve.org/CVERecord?id=CVE-2026-21863"
    }, {
      "category" : "external",
      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2026-21863",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-21863"
    }, {
      "category" : "external",
      "summary" : "https://github.com/valkey-io/valkey/security/advisories/GHSA-c677-q3wr-gggq",
      "url" : "https://github.com/valkey-io/valkey/security/advisories/GHSA-c677-q3wr-gggq"
    } ],
    "release_date" : "2026-02-23T19:41:28.783000+00:00",
    "remediations" : [ {
      "category" : "vendor_fix",
      "date" : "2026-04-17T11:29:33+00:00",
      "details" : "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
      "product_ids" : [ "Red Hat Hardened Images:valkey-main@aarch64", "Red Hat Hardened Images:valkey-main@noarch", "Red Hat Hardened Images:valkey-main@src", "Red Hat Hardened Images:valkey-main@x86_64" ],
      "restart_required" : {
        "category" : "none"
      },
      "url" : "https://access.redhat.com/errata/RHSA-2026:8753"
    }, {
      "category" : "workaround",
      "details" : "To mitigate this issue, restrict network access to the Valkey cluster bus port. Configure network access control lists (ACLs) or firewall rules to ensure that only trusted hosts can connect to the cluster bus port. This limits the attack surface by preventing unauthorized actors from sending malicious clusterbus packets.",
      "product_ids" : [ "Red Hat Hardened Images:valkey-main@aarch64", "Red Hat Hardened Images:valkey-main@noarch", "Red Hat Hardened Images:valkey-main@src", "Red Hat Hardened Images:valkey-main@x86_64" ]
    } ],
    "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"
      },
      "products" : [ "Red Hat Hardened Images:valkey-main@aarch64", "Red Hat Hardened Images:valkey-main@noarch", "Red Hat Hardened Images:valkey-main@src", "Red Hat Hardened Images:valkey-main@x86_64" ]
    } ],
    "threats" : [ {
      "category" : "impact",
      "details" : "Important"
    } ],
    "title" : "valkey: Valkey: Denial of Service via invalid clusterbus packet"
  } ]
}