{
  "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-2026-64322",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-64322",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-25T08:49:50.180Z",
    "updatedAt": "2026-10-19T20:38:23.865Z",
    "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 sparing table length as an entry count, not a byte count",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nudf: validate sparing table length as an entry count, not a byte count\n\nudf_load_sparable_map() accepts a sparing table when\n\n\tsizeof(*st) + le16_to_cpu(st->reallocationTableLen) > sb->s_blocksize\n\nis false, i.e. it treats reallocationTableLen as a number of BYTES that\nmust fit in the block.  But the table is walked as an array of 8-byte\nsparingEntry elements:\n\n\tfor (i = 0; i < le16_to_cpu(st->reallocationTableLen); i++) {\n\t\tstruct sparingEntry *entry = &st->mapEntry[i];\n\t\t... entry->origLocation ...\n\t}\n\nin udf_get_pblock_spar15() and udf_relocate_blocks().  A\nreallocationTableLen of N therefore passes the check whenever\nsizeof(*st) + N <= blocksize, yet the consumers index\nsizeof(*st) + N * sizeof(struct sparingEntry) bytes -- up to ~8x the\nblock.  On a crafted UDF image this is an out-of-bounds read in\nudf_get_pblock_spar15(); udf_relocate_blocks() additionally feeds the\nsame length to udf_update_tag(), whose crc_itu_t() reads far past the\nblock, and its memmove() through st->mapEntry[] is an out-of-bounds\nwrite.\n\nValidate reallocationTableLen as the entry count it is, with\nstruct_size().",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "1df2ae31c724e57be9d7ac00d78db8a5dabdd050",
              "status": "affected",
              "versionType": "git",
              "lessThan": "eeb0f3e193f8e523d03e4c9e084f6b4875f50e8e"
            },
            {
              "version": "1df2ae31c724e57be9d7ac00d78db8a5dabdd050",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0a9b79a951cfd70a9d31ca01ae2d08a20bb730e9"
            },
            {
              "version": "1df2ae31c724e57be9d7ac00d78db8a5dabdd050",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2d726135099313958f8975532a2e15322ff150ce"
            },
            {
              "version": "1df2ae31c724e57be9d7ac00d78db8a5dabdd050",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7285276aa50d2839afb5957ffd491ad282dc8f72"
            },
            {
              "version": "1df2ae31c724e57be9d7ac00d78db8a5dabdd050",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2a219acb2ce674d99bbd1b7b35ed8c384dac7200"
            },
            {
              "version": "1df2ae31c724e57be9d7ac00d78db8a5dabdd050",
              "status": "affected",
              "versionType": "git",
              "lessThan": "04f4599a9efb90992d072a814960edf0cd62805d"
            },
            {
              "version": "1df2ae31c724e57be9d7ac00d78db8a5dabdd050",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7f7774b9da0ef17b87bfa238cf966ad0b3376150"
            },
            {
              "version": "1df2ae31c724e57be9d7ac00d78db8a5dabdd050",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3ec997bd5508e9b25210b5bbec89031629cdb093"
            },
            {
              "version": "e240873cb4a9fd18de60a817100a96fe670d4359",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "9ae30e324a96d0328a575329d7a95a09b3318601",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "b1c5701ad6b3e5d21d16f65475651cfaaa41e7aa",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "a9f1af04f086656246f30354fb4564ce3b08c4a0",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "4836ee563d65bb492f907cbe267a5761b9693e4d",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "2.6.32.60",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "2.6.33"
            },
            {
              "version": "2.6.34.14",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "2.6.35"
            },
            {
              "version": "3.0.37",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "3.1"
            },
            {
              "version": "3.2.23",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "3.3"
            },
            {
              "version": "3.4.5",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "3.5"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.5",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.5"
            },
            {
              "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": "*"
            }
          ]
        }
      ]
    }
  }
}