{"id":"CVE-2025-40167","summary":"ext4: detect invalid INLINE_DATA + EXTENTS flag combination","details":"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 \u003c 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.","modified":"2026-04-02T12:48:18.728946Z","published":"2025-11-12T10:26:24.498Z","related":["SUSE-SU-2026:0278-1","SUSE-SU-2026:0281-1","SUSE-SU-2026:0293-1","SUSE-SU-2026:0315-1","SUSE-SU-2026:0316-1","SUSE-SU-2026:20207-1","SUSE-SU-2026:20220-1","SUSE-SU-2026:20228-1","SUSE-SU-2026:20477-1","SUSE-SU-2026:20498-1","SUSE-SU-2026:20845-1","SUSE-SU-2026:20876-1","openSUSE-SU-2026:20145-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40167.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1437c95ab2a28b138d4521653583729f61ccb48b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1d3ad183943b38eec2acf72a0ae98e635dc8456b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1f5ccd22ff482639133f2a0fe08f6d19d0e68717"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2e9e10657b04152ed0d6ecae8d0c02a3405e28f5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4954d297c91d292630ab43ba4d195dc371ce65d3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cb6039b68efa547b676a8a10fc4618d9d1865c23"},{"type":"WEB","url":"https://git.kernel.org/stable/c/de985264eef64be8a90595908f2e6a87946dad34"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f061f7c331fc16250fc82aa68964f35821687217"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40167.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-40167"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f19d5870cbf72d4cb2a8e1f749dff97af99b071e"},{"fixed":"4954d297c91d292630ab43ba4d195dc371ce65d3"},{"fixed":"f061f7c331fc16250fc82aa68964f35821687217"},{"fixed":"2e9e10657b04152ed0d6ecae8d0c02a3405e28f5"},{"fixed":"1437c95ab2a28b138d4521653583729f61ccb48b"},{"fixed":"cb6039b68efa547b676a8a10fc4618d9d1865c23"},{"fixed":"de985264eef64be8a90595908f2e6a87946dad34"},{"fixed":"1f5ccd22ff482639133f2a0fe08f6d19d0e68717"},{"fixed":"1d3ad183943b38eec2acf72a0ae98e635dc8456b"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-40167.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.8.0"},{"fixed":"5.4.301"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.10.246"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.196"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.158"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.114"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.55"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.17.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-40167.json"}}],"schema_version":"1.7.5"}