CVE-2025-40167
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2025
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
ext4: detect invalid INLINE_DATA + EXTENTS flag combination
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| f19d5870cbf72d4cb2a8e1f749dff97af99b071e | affected | git | 4954d297c91d292630ab43ba4d195dc371ce65d3 | Unavailable | None listed |
| f19d5870cbf72d4cb2a8e1f749dff97af99b071e | affected | git | f061f7c331fc16250fc82aa68964f35821687217 | Unavailable | None listed |
| f19d5870cbf72d4cb2a8e1f749dff97af99b071e | affected | git | 2e9e10657b04152ed0d6ecae8d0c02a3405e28f5 | Unavailable | None listed |
| f19d5870cbf72d4cb2a8e1f749dff97af99b071e | affected | git | 1437c95ab2a28b138d4521653583729f61ccb48b | Unavailable | None listed |
| f19d5870cbf72d4cb2a8e1f749dff97af99b071e | affected | git | cb6039b68efa547b676a8a10fc4618d9d1865c23 | Unavailable | None listed |
| f19d5870cbf72d4cb2a8e1f749dff97af99b071e | affected | git | de985264eef64be8a90595908f2e6a87946dad34 | Unavailable | None listed |
| f19d5870cbf72d4cb2a8e1f749dff97af99b071e | affected | git | 1f5ccd22ff482639133f2a0fe08f6d19d0e68717 | Unavailable | None listed |
| f19d5870cbf72d4cb2a8e1f749dff97af99b071e | affected | git | 1d3ad183943b38eec2acf72a0ae98e635dc8456b | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 3.8 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 3.8 | Unavailable | None listed |
| 5.4.301 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.246 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.196 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.158 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.114 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.55 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.17.5 | unaffected | semver | Unavailable | 6.17.* | None listed |
| 6.18 | unaffected | original_commit_for_fix | Unavailable | * | None listed |