{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-64324",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-64324",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-25T08:49:52.063Z",
    "updatedAt": "2026-10-19T20:38:24.164Z",
    "importedAt": "2026-10-24T01:58:25.636Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "udf: validate free block extents against the partition length",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nudf: validate free block extents against the partition length\n\nudf_free_blocks() checks the logical block number and count against the\npartition length, but drops the extent offset from that final bound.  A\ncrafted extent can pass the guard while logicalBlockNum + offset + count\npoints past the partition, which later indexes past the space bitmap\narray.\n\nA single ftruncate(2) on a file backed by such an extent reliably\npanics the kernel.  This is a local availability issue.  On desktop\nsystems where UDisks/polkit allows the active user to mount removable\nUDF media without CAP_SYS_ADMIN, an unprivileged local user can supply\nthe crafted filesystem and trigger the panic by truncating a writable\nfile on it.  Systems that require root or CAP_SYS_ADMIN to mount the\nimage have a higher prerequisite.\n\nNo confidentiality or integrity impact is claimed: the reproduced\nprimitive is an out-of-bounds read of a bitmap pointer slot followed by\na kernel panic.\n\nUse the already computed logicalBlockNum + offset + count value for the\npartition length check.  Also make load_block_bitmap() reject an\nout-of-range block group before indexing s_block_bitmap[], so corrupted\ncallers cannot walk past the flexible array.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "934f815345c09c290a9b9a9cfdddc203ec2117e8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "fdd6229d2ae9914c1f25d1041db0f4f312a4fa76"
            },
            {
              "version": "22cc7323f090646c8cfb5939e6f15bdc2ed3fd27",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b54aee5652fcd7c23a0904a4623ec462c3edc70c"
            },
            {
              "version": "7c4fa9ebfce69619d132fe703dc2e2cf62a13723",
              "status": "affected",
              "versionType": "git",
              "lessThan": "12af328d2ee8d68e81ba612246d0b54b22d23e1f"
            },
            {
              "version": "5cc9745e2ea11aef7d5c9a42bc36f6cd3e1b4cc3",
              "status": "affected",
              "versionType": "git",
              "lessThan": "fb49099206c5c57af28a157249fa7bcb5518f99e"
            },
            {
              "version": "56e69e59751d20993f243fb7dd6991c4e522424c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9442d75429b0c556292a7454fe888d54259f5240"
            },
            {
              "version": "56e69e59751d20993f243fb7dd6991c4e522424c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "335202ab25b01fdd45889ff25eab70864686dea3"
            },
            {
              "version": "56e69e59751d20993f243fb7dd6991c4e522424c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "be87de7789a82a030a4896bc7683415ec9fa6f2b"
            },
            {
              "version": "56e69e59751d20993f243fb7dd6991c4e522424c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5f0419457f89dce1a3f1c8e62a3adf2f39ab8168"
            },
            {
              "version": "097420e48e30f51e8f4f650b5c946f5af63ec1a3",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5def895b42ef16a2da6402818cba8d7ec8ede1ef",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "05fb2bf477d3fe5421bd4cb699574737f52bd88b",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.10.224",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.10.261"
            },
            {
              "version": "5.15.165",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.212"
            },
            {
              "version": "6.1.105",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.1.178"
            },
            {
              "version": "6.6.46",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.6.145"
            },
            {
              "version": "4.19.320",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.20"
            },
            {
              "version": "5.4.282",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.5"
            },
            {
              "version": "6.10.5",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.11"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.11",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.11"
            },
            {
              "version": "5.10.261",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.212",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.178",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.145",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.96",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.39",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}