{"id":"CVE-2025-40167","revision":null,"records":[{"revision":"3c3354717ed944b9bedb1ba0b4b6be7b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-40167","aliases":[],"title":"ext4: detect invalid INLINE_DATA + EXTENTS flag combination","description":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: detect invalid INLINE_DATA + EXTENTS flag combination\n\nsyzbot reported a BUG_ON in ext4_es_cache_extent() when opening a verity\nfile on a corrupted ext4 filesystem mounted without a journal.\n\nThe issue is that the filesystem has an inode with both the INLINE_DATA\nand EXTENTS flags set:\n\n EXT4-fs error (device loop0): ext4_cache_extents:545: inode #15:\n comm syz.0.17: corrupted extent tree: lblk 0 < prev 66\n\nInvestigation revealed that the inode has both flags set:\n DEBUG: inode 15 - flag=1, i_inline_off=164, has_inline=1, extents_flag=1\n\nThis is an invalid combination since an inode should have either:\n- INLINE_DATA: data stored directly in the inode\n- EXTENTS: data stored in extent-mapped blocks\n\nHaving both flags causes ext4_has_inline_data() to return true, skipping\nextent tree validation in __ext4_iget(). The unvalidated out-of-order\nextents then trigger a BUG_ON in ext4_es_cache_extent() due to integer\nunderflow when calculating hole sizes.\n\nFix this by detecting this invalid flag combination early in ext4_iget()\nand rejecting the corrupted inode.","state":0,"publishedAt":"2025-11-12T10:26:24.498+00:00","modifiedAt":"2026-10-15T22:02:39.184+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"fs/ext4/inode.c\"\n ],\n \"versions\": [\n {\n \"version\": \"f19d5870cbf72d4cb2a8e1f749dff97af99b071e\",\n \"lessThan\": \"4954d297c91d292630ab43ba4d195dc371ce65d3\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f19d5870cbf72d4cb2a8e1f749dff97af99b071e\",\n \"lessThan\": \"f061f7c331fc16250fc82aa68964f35821687217\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f19d5870cbf72d4cb2a8e1f749dff97af99b071e\",\n \"lessThan\": \"2e9e10657b04152ed0d6ecae8d0c02a3405e28f5\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f19d5870cbf72d4cb2a8e1f749dff97af99b071e\",\n \"lessThan\": \"1437c95ab2a28b138d4521653583729f61ccb48b\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f19d5870cbf72d4cb2a8e1f749dff97af99b071e\",\n \"lessThan\": \"cb6039b68efa547b676a8a10fc4618d9d1865c23\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f19d5870cbf72d4cb2a8e1f749dff97af99b071e\",\n \"lessThan\": \"de985264eef64be8a90595908f2e6a87946dad34\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f19d5870cbf72d4cb2a8e1f749dff97af99b071e\",\n \"lessThan\": \"1f5ccd22ff482639133f2a0fe08f6d19d0e68717\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f19d5870cbf72d4cb2a8e1f749dff97af99b071e\",\n \"lessThan\": \"1d3ad183943b38eec2acf72a0ae98e635dc8456b\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"fs/ext4/inode.c\"\n ],\n \"versions\": [\n {\n \"version\": \"3.8\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"3.8\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.4.301\",\n \"lessThanOrEqual\": \"5.4.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.246\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.196\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.158\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.114\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.55\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.17.5\",\n \"lessThanOrEqual\": \"6.17.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/4954d297c91d292630ab43ba4d195dc371ce65d3","https://git.kernel.org/stable/c/f061f7c331fc16250fc82aa68964f35821687217","https://git.kernel.org/stable/c/2e9e10657b04152ed0d6ecae8d0c02a3405e28f5","https://git.kernel.org/stable/c/1437c95ab2a28b138d4521653583729f61ccb48b","https://git.kernel.org/stable/c/cb6039b68efa547b676a8a10fc4618d9d1865c23","https://git.kernel.org/stable/c/de985264eef64be8a90595908f2e6a87946dad34","https://git.kernel.org/stable/c/1f5ccd22ff482639133f2a0fe08f6d19d0e68717","https://git.kernel.org/stable/c/1d3ad183943b38eec2acf72a0ae98e635dc8456b"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-40167","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-40167","identifiers":["CVE-2025-40167"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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