{
  "document" : {
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      "namespace" : "https://access.redhat.com/security/updates/classification/",
      "text" : "Moderate"
    },
    "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\nxz:\n  * xz-5.8.3-1.1.hum1 (aarch64, x86_64)\n  * xz-devel-5.8.3-1.1.hum1 (aarch64, x86_64)\n  * xz-libs-5.8.3-1.1.hum1 (aarch64, x86_64)\n  * xz-lzma-compat-5.8.3-1.1.hum1 (aarch64, x86_64)\n  * xz-static-5.8.3-1.1.hum1 (aarch64, x86_64)\n  * xz-5.8.3-1.1.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-2026:7647",
      "url" : "https://access.redhat.com/errata/RHSA-2026:7647"
    }, {
      "category" : "external",
      "summary" : "https://images.redhat.com/",
      "url" : "https://images.redhat.com/"
    }, {
      "category" : "external",
      "summary" : "https://access.redhat.com/security/cve/CVE-2026-34743",
      "url" : "https://access.redhat.com/security/cve/CVE-2026-34743"
    }, {
      "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_7647.json"
    } ],
    "title" : "Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update",
    "tracking" : {
      "current_release_date" : "2026-04-19T19:35:53+00:00",
      "generator" : {
        "date" : "2026-04-19T19:35:53+00:00",
        "engine" : {
          "name" : "Red Hat SDEngine",
          "version" : "4.7.5"
        }
      },
      "id" : "RHSA-2026:7647",
      "initial_release_date" : "2026-04-11T00:39:54+00:00",
      "revision_history" : [ {
        "date" : "2026-04-11T00:39:54+00:00",
        "number" : "1",
        "summary" : "Initial version"
      }, {
        "date" : "2026-04-18T19:56:23+00:00",
        "number" : "2",
        "summary" : "Last updated version"
      }, {
        "date" : "2026-04-19T19:35:53+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" : "xz-main@aarch64",
          "product" : {
            "name" : "xz-main@aarch64",
            "product_id" : "xz-main@aarch64",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/xz@5.8.3-1.1.hum1?arch=aarch64&distro=hummingbird-20251124&repository_id=public-hummingbird-aarch64-rpms"
            }
          }
        } ],
        "category" : "architecture",
        "name" : "aarch64"
      }, {
        "branches" : [ {
          "category" : "product_version",
          "name" : "xz-main@src",
          "product" : {
            "name" : "xz-main@src",
            "product_id" : "xz-main@src",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/xz@5.8.3-1.1.hum1?arch=src&distro=hummingbird-20251124&repository_id=public-hummingbird-source-rpms"
            }
          }
        } ],
        "category" : "architecture",
        "name" : "src"
      }, {
        "branches" : [ {
          "category" : "product_version",
          "name" : "xz-main@x86_64",
          "product" : {
            "name" : "xz-main@x86_64",
            "product_id" : "xz-main@x86_64",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/xz@5.8.3-1.1.hum1?arch=x86_64&distro=hummingbird-20251124&repository_id=public-hummingbird-x86_64-rpms"
            }
          }
        } ],
        "category" : "architecture",
        "name" : "x86_64"
      } ],
      "category" : "vendor",
      "name" : "Red Hat"
    } ],
    "relationships" : [ {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "xz-main@aarch64 as a component of Red Hat Hardened Images",
        "product_id" : "Red Hat Hardened Images:xz-main@aarch64"
      },
      "product_reference" : "xz-main@aarch64",
      "relates_to_product_reference" : "Red Hat Hardened Images"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "xz-main@src as a component of Red Hat Hardened Images",
        "product_id" : "Red Hat Hardened Images:xz-main@src"
      },
      "product_reference" : "xz-main@src",
      "relates_to_product_reference" : "Red Hat Hardened Images"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "xz-main@x86_64 as a component of Red Hat Hardened Images",
        "product_id" : "Red Hat Hardened Images:xz-main@x86_64"
      },
      "product_reference" : "xz-main@x86_64",
      "relates_to_product_reference" : "Red Hat Hardened Images"
    } ]
  },
  "vulnerabilities" : [ {
    "cve" : "CVE-2026-34743",
    "cwe" : {
      "id" : "CWE-131",
      "name" : "Incorrect Calculation of Buffer Size"
    },
    "discovery_date" : "2026-04-02T19:02:56.599601+00:00",
    "ids" : [ {
      "system_name" : "Red Hat Bugzilla ID",
      "text" : "2454589"
    } ],
    "notes" : [ {
      "category" : "description",
      "text" : "A flaw was found in XZ Utils. When the `lzma_index_decoder()` function processes an empty index, and a subsequent `lzma_index_append()` operation is performed, insufficient memory is allocated. This can lead to a buffer overflow, potentially causing a denial of service (DoS) for affected systems.",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "xz: XZ Utils: Denial of Service via buffer overflow in index decoding",
      "title" : "Vulnerability summary"
    }, {
      "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:xz-main@aarch64", "Red Hat Hardened Images:xz-main@src", "Red Hat Hardened Images:xz-main@x86_64" ]
    },
    "references" : [ {
      "category" : "self",
      "summary" : "Canonical URL",
      "url" : "https://access.redhat.com/security/cve/CVE-2026-34743"
    }, {
      "category" : "external",
      "summary" : "RHBZ#2454589",
      "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2454589"
    }, {
      "category" : "external",
      "summary" : "https://www.cve.org/CVERecord?id=CVE-2026-34743",
      "url" : "https://www.cve.org/CVERecord?id=CVE-2026-34743"
    }, {
      "category" : "external",
      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2026-34743",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-34743"
    }, {
      "category" : "external",
      "summary" : "https://github.com/tukaani-project/xz/commit/c8c22869e780ff57c96b46939c3d79ff99395f87",
      "url" : "https://github.com/tukaani-project/xz/commit/c8c22869e780ff57c96b46939c3d79ff99395f87"
    }, {
      "category" : "external",
      "summary" : "https://github.com/tukaani-project/xz/releases/tag/v5.8.3",
      "url" : "https://github.com/tukaani-project/xz/releases/tag/v5.8.3"
    }, {
      "category" : "external",
      "summary" : "https://github.com/tukaani-project/xz/security/advisories/GHSA-x872-m794-cxhv",
      "url" : "https://github.com/tukaani-project/xz/security/advisories/GHSA-x872-m794-cxhv"
    } ],
    "release_date" : "2026-04-02T18:36:37.450000+00:00",
    "remediations" : [ {
      "category" : "vendor_fix",
      "date" : "2026-04-11T00:39:54+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:xz-main@aarch64", "Red Hat Hardened Images:xz-main@src", "Red Hat Hardened Images:xz-main@x86_64" ],
      "restart_required" : {
        "category" : "none"
      },
      "url" : "https://access.redhat.com/errata/RHSA-2026:7647"
    } ],
    "scores" : [ {
      "cvss_v3" : {
        "attackComplexity" : "LOW",
        "attackVector" : "NETWORK",
        "availabilityImpact" : "LOW",
        "baseScore" : 5.3,
        "baseSeverity" : "MEDIUM",
        "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:L",
        "version" : "3.1"
      },
      "products" : [ "Red Hat Hardened Images:xz-main@aarch64", "Red Hat Hardened Images:xz-main@src", "Red Hat Hardened Images:xz-main@x86_64" ]
    } ],
    "threats" : [ {
      "category" : "impact",
      "details" : "Moderate"
    } ],
    "title" : "xz: XZ Utils: Denial of Service via buffer overflow in index decoding"
  } ]
}