{
  "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-2026-80881",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-80881",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-04T16:49:11.758Z",
    "updatedAt": "2026-09-04T16:49:11.758Z",
    "importedAt": "2026-10-24T01:58:30.346Z",
    "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": "ocfs2: fix buffer head management in ocfs2_read_blocks()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix buffer head management in ocfs2_read_blocks()\n\nIn ocfs2_read_blocks(), caller should't assume that buffer head returned\nby 'sb_getblk()' is exclusively owned and so 'put_bh()' always drops\nb_count from 1 to 0.  If it is not so, buffer head remains on hold and\nlikely to be returned by the next call to 'sb_getblk()' unchanged - that\nis, with BH_Uptodate bit set even if it has failed validation previously,\nthus allowing to insert that buffer head into OCFS2 metadata cache and\nsubmit it to upper layers.  To avoid such a scenario, BH_Uptodate should\nbe cleared immediately after 'validate()' callback has detected some data\ninconsistency.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "cf76c78595ca87548ca5e45c862ac9e0949c4687",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a4eae1499c760949a93459d11390bd1fd823d31d"
            },
            {
              "version": "cf76c78595ca87548ca5e45c862ac9e0949c4687",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4ab17e328522a4df5fe0f0dcf39098118b1feeaa"
            },
            {
              "version": "cf76c78595ca87548ca5e45c862ac9e0949c4687",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5927acb3e2c99985a14adecd9d1b67ba191c622d"
            },
            {
              "version": "cf76c78595ca87548ca5e45c862ac9e0949c4687",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ecb3f9386f4353034caef77239473c627232db17"
            },
            {
              "version": "cf76c78595ca87548ca5e45c862ac9e0949c4687",
              "status": "affected",
              "versionType": "git",
              "lessThan": "61f7a5acb3bf8fc97dad78f54b1e8d0e1c819766"
            },
            {
              "version": "cf76c78595ca87548ca5e45c862ac9e0949c4687",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0e389fc290c350c67591abf4c367119f4689f310"
            },
            {
              "version": "cf76c78595ca87548ca5e45c862ac9e0949c4687",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9e7a057934cdd58e4cc94350bcfe5367bbee0f8e"
            },
            {
              "version": "cf76c78595ca87548ca5e45c862ac9e0949c4687",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6371a07148ee979af22a9d6f4c277462953a9a4a"
            },
            {
              "version": "01f93d5e36753fc4d06ec67f05ce78c9c6f2dd56",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "65cbd1279f4b999d56a838344a30642db24cd215",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "97e1db17bc1ef4c2e1789bc9323c7be44fba53f8",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "6c150df9c2e80b5cf86f5a0d98beb7390ad63bfc",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "4.4.204",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.5"
            },
            {
              "version": "4.9.204",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.10"
            },
            {
              "version": "4.14.157",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.15"
            },
            {
              "version": "4.19.87",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.20"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.20",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.20"
            },
            {
              "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": "6.12.97",
              "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": "*"
            }
          ]
        }
      ]
    }
  }
}