{
  "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-2026-72225",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-72225",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-08-15T05:54:17.541Z",
    "updatedAt": "2026-10-16T18:45:02.597Z",
    "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": "jbd2: fix integer underflow in jbd2_journal_initialize_fast_commit()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\njbd2: fix integer underflow in jbd2_journal_initialize_fast_commit()\n\njbd2_journal_initialize_fast_commit() validates journal capacity by\nchecking (journal->j_last - num_fc_blks < JBD2_MIN_JOURNAL_BLOCKS).\nBoth j_last and num_fc_blks are unsigned, so when num_fc_blks exceeds\nj_last the subtraction wraps to a large value, bypassing the bounds\ncheck.\n\nThe resulting underflow corrupts j_last, j_fc_first, and j_free,\nleading to journal abort.\n\nFix by checking num_fc_blks against j_last before the subtraction,\nreturning -EFSCORRUPTED.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "6866d7b3f2bb4f011041ba54c98b1584497fe2fd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "aa90f00932bf572d6ef284c977c2a60b39c13bd6"
            },
            {
              "version": "6866d7b3f2bb4f011041ba54c98b1584497fe2fd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e144ad0250f77e23e28949587b8b57e40dc3b512"
            },
            {
              "version": "6866d7b3f2bb4f011041ba54c98b1584497fe2fd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4b48dcb88bb9117e3d3f051175a9a8b7cff7f8b6"
            },
            {
              "version": "6866d7b3f2bb4f011041ba54c98b1584497fe2fd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "fb9b49618ed7296ebfad62a3835da8945f727001"
            },
            {
              "version": "6866d7b3f2bb4f011041ba54c98b1584497fe2fd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4450dcaadf7d4aae8b6e4223b5d6ee4eb77097a9"
            },
            {
              "version": "6866d7b3f2bb4f011041ba54c98b1584497fe2fd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "78955fdce8ff654e6d33a2fa90882a1e7eb26330"
            },
            {
              "version": "6866d7b3f2bb4f011041ba54c98b1584497fe2fd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a58fc10adf503969fec2007b5afe8987258046c4"
            },
            {
              "version": "6866d7b3f2bb4f011041ba54c98b1584497fe2fd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "289a2ca0c9b7eae74f93fc213b0b971669b8683d"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.10",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.10"
            },
            {
              "version": "5.10.266",
              "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": "6.12.97",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.40",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.5",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}