{
  "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-2026-31449",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-31449",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-04-22T13:53:44.777Z",
    "updatedAt": "2026-10-19T18:35:48.867Z",
    "importedAt": "2026-10-24T01:58:02.025Z",
    "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": "ext4: validate p_idx bounds in ext4_ext_correct_indexes",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: validate p_idx bounds in ext4_ext_correct_indexes\n\next4_ext_correct_indexes() walks up the extent tree correcting\nindex entries when the first extent in a leaf is modified. Before\naccessing path[k].p_idx->ei_block, there is no validation that\np_idx falls within the valid range of index entries for that\nlevel.\n\nIf the on-disk extent header contains a corrupted or crafted\neh_entries value, p_idx can point past the end of the allocated\nbuffer, causing a slab-out-of-bounds read.\n\nFix this by validating path[k].p_idx against EXT_LAST_INDEX() at\nboth access sites: before the while loop and inside it. Return\n-EFSCORRUPTED if the index pointer is out of range, consistent\nwith how other bounds violations are handled in the ext4 extent\ntree code.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "a86c61812637c7dd0c57e29880cffd477b62f2e7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "39d6e2b67651614bac0dc6592fa9836321910067"
            },
            {
              "version": "a86c61812637c7dd0c57e29880cffd477b62f2e7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c5839b34704c9c2f47f079451bdbb22de0da1ed1"
            },
            {
              "version": "a86c61812637c7dd0c57e29880cffd477b62f2e7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "10242e640b36b91ad03d25f3dc77854bbdff8358"
            },
            {
              "version": "a86c61812637c7dd0c57e29880cffd477b62f2e7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4d08401aa13f1531216f1a7ae281ca4806e90a5c"
            },
            {
              "version": "a86c61812637c7dd0c57e29880cffd477b62f2e7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "407c944f217c17d4343148011acafebc604d55e1"
            },
            {
              "version": "a86c61812637c7dd0c57e29880cffd477b62f2e7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "93f2e975ed658ce09db4d4c2877ca2c06540df83"
            },
            {
              "version": "a86c61812637c7dd0c57e29880cffd477b62f2e7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "01bf1e0b997d82c0e353b51ed74ef99698043c33"
            },
            {
              "version": "a86c61812637c7dd0c57e29880cffd477b62f2e7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2acb5c12ebd860f30e4faf67e6cc8c44ddfe5fe8"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.19",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.19"
            },
            {
              "version": "5.10.259",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.210",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.175",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.140",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.80",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.21",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19.11",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "version": "7.0",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}