cbcvebase.
CVE-2025-40167
published 2025-11-12

CVE-2025-40167: In the Linux kernel, the following vulnerability has been resolved: ext4: detect invalid INLINE_DATA + EXTENTS flag combination syzbot reported a BUG_ON in…

PriorityP337high7.8CVSS 3.1
AVLACLPRNUIRSUCHIHAH
EPSS
0.15%
4.7th percentile
In the Linux kernel, the following vulnerability has been resolved: ext4: detect invalid INLINE_DATA + EXTENTS flag combination syzbot reported a BUG_ON in ext4_es_cache_extent() when opening a verity file on a corrupted ext4 filesystem mounted without a journal. The issue is that the filesystem has an inode with both the INLINE_DATA and EXTENTS flags set: EXT4-fs error (device loop0): ext4_cache_extents:545: inode #15: comm syz.0.17: corrupted extent tree: lblk 0 < prev 66 Investigation revealed that the inode has both flags set: DEBUG: inode 15 - flag=1, i_inline_off=164, has_inline=1, extents_flag=1 This is an invalid combination since an inode should have either: - INLINE_DATA: data stored directly in the inode - EXTENTS: data stored in extent-mapped blocks Having both flags causes ext4_has_inline_data() to return true, skipping extent tree validation in __ext4_iget(). The unvalidated out-of-order extents then trigger a BUG_ON in ext4_es_cache_extent() due to integer underflow when calculating hole sizes. Fix this by detecting this invalid flag combination early in ext4_iget() and rejecting the corrupted inode.

Affected

32 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.158-1 (bookworm)linux 6.1.158-1 (bookworm)
debianlinux-6.1< linux 6.1.158-1 (bookworm)linux 6.1.158-1 (bookworm)
linuxlinux
linuxlinux>= f19d5870cbf72d4cb2a8e1f749dff97af99b071e < 4954d297c91d292630ab43ba4d195dc371ce65d34954d297c91d292630ab43ba4d195dc371ce65d3
linuxlinux>= f19d5870cbf72d4cb2a8e1f749dff97af99b071e < f061f7c331fc16250fc82aa68964f35821687217f061f7c331fc16250fc82aa68964f35821687217
linuxlinux>= f19d5870cbf72d4cb2a8e1f749dff97af99b071e < 2e9e10657b04152ed0d6ecae8d0c02a3405e28f52e9e10657b04152ed0d6ecae8d0c02a3405e28f5
linuxlinux>= f19d5870cbf72d4cb2a8e1f749dff97af99b071e < 1437c95ab2a28b138d4521653583729f61ccb48b1437c95ab2a28b138d4521653583729f61ccb48b
linuxlinux>= f19d5870cbf72d4cb2a8e1f749dff97af99b071e < cb6039b68efa547b676a8a10fc4618d9d1865c23cb6039b68efa547b676a8a10fc4618d9d1865c23
linuxlinux>= f19d5870cbf72d4cb2a8e1f749dff97af99b071e < de985264eef64be8a90595908f2e6a87946dad34de985264eef64be8a90595908f2e6a87946dad34
linuxlinux>= f19d5870cbf72d4cb2a8e1f749dff97af99b071e < 1f5ccd22ff482639133f2a0fe08f6d19d0e687171f5ccd22ff482639133f2a0fe08f6d19d0e68717
linuxlinux>= f19d5870cbf72d4cb2a8e1f749dff97af99b071e < 1d3ad183943b38eec2acf72a0ae98e635dc8456b1d3ad183943b38eec2acf72a0ae98e635dc8456b
linuxlinux_kernel>= 0 < 5.10.247-15.10.247-1
linuxlinux_kernel>= 0 < 6.1.158-16.1.158-1
linuxlinux_kernel>= 0 < 6.12.57-16.12.57-1
linuxlinux_kernel>= 0 < 6.17.6-16.17.6-1
linuxlinux_kernel>= 0 < 5.15.0-170.1805.15.0-170.180
linuxlinux_kernel>= 0 < 6.8.0-106.1066.8.0-106.106
linuxlinux_kernel>= 0 < 6.17.0-14.146.17.0-14.14
linuxlinux_kernel>= 3.8.0 < 5.4.3015.4.301
linuxlinux_kernel>= 5.11.0 < 5.15.1965.15.196
linuxlinux_kernel>= 5.16.0 < 6.1.1586.1.158
linuxlinux_kernel>= 5.5.0 < 5.10.2465.10.246
linuxlinux_kernel>= 6.13.0 < 6.17.56.17.5
linuxlinux_kernel>= 6.2.0 < 6.6.1146.6.114
linuxlinux_kernel>= 6.7.0 < 6.12.556.12.55

CVSS provenance

nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_ubuntu7.8HIGH
vendor_redhat5.8MEDIUM
vendor_msrc5.5MEDIUM
vendor_oracle5.3MEDIUM
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