{
  "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-2025-40233",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-40233",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-12-04T15:31:23.891Z",
    "updatedAt": "2026-08-05T12:08:43.055Z",
    "importedAt": "2026-10-24T01:57:34.152Z",
    "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: clear extent cache after moving/defragmenting extents",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: clear extent cache after moving/defragmenting extents\n\nThe extent map cache can become stale when extents are moved or\ndefragmented, causing subsequent operations to see outdated extent flags. \nThis triggers a BUG_ON in ocfs2_refcount_cal_cow_clusters().\n\nThe problem occurs when:\n1. copy_file_range() creates a reflinked extent with OCFS2_EXT_REFCOUNTED\n2. ioctl(FITRIM) triggers ocfs2_move_extents()\n3. __ocfs2_move_extents_range() reads and caches the extent (flags=0x2)\n4. ocfs2_move_extent()/ocfs2_defrag_extent() calls __ocfs2_move_extent()\n   which clears OCFS2_EXT_REFCOUNTED flag on disk (flags=0x0)\n5. The extent map cache is not invalidated after the move\n6. Later write() operations read stale cached flags (0x2) but disk has\n   updated flags (0x0), causing a mismatch\n7. BUG_ON(!(rec->e_flags & OCFS2_EXT_REFCOUNTED)) triggers\n\nFix by clearing the extent map cache after each extent move/defrag\noperation in __ocfs2_move_extents_range().  This ensures subsequent\noperations read fresh extent data from disk.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "53069d4e76954e2e63c1b3c501051c6fbcf7298c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "93166bc53c0e3587058327a4121daea34b4fecd5"
            },
            {
              "version": "53069d4e76954e2e63c1b3c501051c6fbcf7298c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a7ee72286efba1d407c6f15a0528e43593fb7007"
            },
            {
              "version": "53069d4e76954e2e63c1b3c501051c6fbcf7298c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "93b1ab422f1966b71561158e1aedce4ec100f357"
            },
            {
              "version": "53069d4e76954e2e63c1b3c501051c6fbcf7298c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e92af7737a94a729225d2a5d180eaaa77fe0bbc1"
            },
            {
              "version": "53069d4e76954e2e63c1b3c501051c6fbcf7298c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "aa6a21409dd6221bb268b56bb410e031c632ff9a"
            },
            {
              "version": "53069d4e76954e2e63c1b3c501051c6fbcf7298c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "bb69928ed578f881e68d26aaf1a8f6e7faab3b44"
            },
            {
              "version": "53069d4e76954e2e63c1b3c501051c6fbcf7298c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a21750df2f6169af6e039a3bb4893d6c9564e48d"
            },
            {
              "version": "53069d4e76954e2e63c1b3c501051c6fbcf7298c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "78a63493f8e352296dbc7cb7b3f4973105e8679e"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.0",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.0"
            },
            {
              "version": "5.4.301",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.246",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.196",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.158",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.115",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.56",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.17.6",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "version": "6.18",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}