{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-40233", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.180Z", "datePublished": "2025-12-04T15:31:23.891Z", "dateUpdated": "2026-05-11T21:45:22.181Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:45:22.181Z"}, "descriptions": [{"lang": "en", "value": "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extent map cache can become stale when extents are moved or\ndefragmented, causing subsequent operations to see outdated extent flags.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": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ocfs2/move_extents.c"], "versions": [{"version": "53069d4e76954e2e63c1b3c501051c6fbcf7298c", "lessThan": "93166bc53c0e3587058327a4121daea34b4fecd5", "status": "affected", "versionType": "git"}, {"version": "53069d4e76954e2e63c1b3c501051c6fbcf7298c", "lessThan": "a7ee72286efba1d407c6f15a0528e43593fb7007", "status": "affected", "versionType": "git"}, {"version": "53069d4e76954e2e63c1b3c501051c6fbcf7298c", "lessThan": "93b1ab422f1966b71561158e1aedce4ec100f357", "status": "affected", "versionType": "git"}, {"version": "53069d4e76954e2e63c1b3c501051c6fbcf7298c", "lessThan": "e92af7737a94a729225d2a5d180eaaa77fe0bbc1", "status": "affected", "versionType": "git"}, {"version": "53069d4e76954e2e63c1b3c501051c6fbcf7298c", "lessThan": "aa6a21409dd6221bb268b56bb410e031c632ff9a", "status": "affected", "versionType": "git"}, {"version": "53069d4e76954e2e63c1b3c501051c6fbcf7298c", "lessThan": "bb69928ed578f881e68d26aaf1a8f6e7faab3b44", "status": "affected", "versionType": "git"}, {"version": "53069d4e76954e2e63c1b3c501051c6fbcf7298c", "lessThan": "a21750df2f6169af6e039a3bb4893d6c9564e48d", "status": "affected", "versionType": "git"}, {"version": "53069d4e76954e2e63c1b3c501051c6fbcf7298c", "lessThan": "78a63493f8e352296dbc7cb7b3f4973105e8679e", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ocfs2/move_extents.c"], "versions": [{"version": "3.0", "status": "affected"}, {"version": "0", "lessThan": "3.0", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.301", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.246", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.196", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.158", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.115", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.56", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17.6", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "5.4.301"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "5.10.246"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "5.15.196"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "6.1.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "6.6.115"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "6.12.56"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "6.17.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "6.18"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/93166bc53c0e3587058327a4121daea34b4fecd5"}, {"url": "https://git.kernel.org/stable/c/a7ee72286efba1d407c6f15a0528e43593fb7007"}, {"url": "https://git.kernel.org/stable/c/93b1ab422f1966b71561158e1aedce4ec100f357"}, {"url": "https://git.kernel.org/stable/c/e92af7737a94a729225d2a5d180eaaa77fe0bbc1"}, {"url": "https://git.kernel.org/stable/c/aa6a21409dd6221bb268b56bb410e031c632ff9a"}, {"url": "https://git.kernel.org/stable/c/bb69928ed578f881e68d26aaf1a8f6e7faab3b44"}, {"url": "https://git.kernel.org/stable/c/a21750df2f6169af6e039a3bb4893d6c9564e48d"}, {"url": "https://git.kernel.org/stable/c/78a63493f8e352296dbc7cb7b3f4973105e8679e"}], "title": "ocfs2: clear extent cache after moving/defragmenting extents", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2025-40233", "lastModified": "2026-04-15T00:35:42.020", "metrics": {}, "published": "2025-12-04T16:16:16.137", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/78a63493f8e352296dbc7cb7b3f4973105e8679e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/93166bc53c0e3587058327a4121daea34b4fecd5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/93b1ab422f1966b71561158e1aedce4ec100f357"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a21750df2f6169af6e039a3bb4893d6c9564e48d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a7ee72286efba1d407c6f15a0528e43593fb7007"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/aa6a21409dd6221bb268b56bb410e031c632ff9a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bb69928ed578f881e68d26aaf1a8f6e7faab3b44"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e92af7737a94a729225d2a5d180eaaa77fe0bbc1"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: ocfs2: clear extent cache after moving/defragmenting extents", "id": "2418818", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2418818"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nocfs2: clear extent cache after moving/defragmenting extents\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().\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()\nwhich 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\nupdated flags (0x0), causing a mismatch\n7. BUG_ON(!(rec->e_flags & OCFS2_EXT_REFCOUNTED)) triggers\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."], "name": "CVE-2025-40233", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-12-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-40233\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-40233\nhttps://lore.kernel.org/linux-cve-announce/2025120401-CVE-2025-40233-adcb@gregkh/T"], "threat_severity": "Moderate"}

{}