{"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extent map cache can become stale when extents are moved or\ndefragmented, causing subsequent operations to see outdated extent flags.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"}}}}