CVE-2025-40233
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)
ocfs2: clear extent cache after moving/defragmenting extents
In the Linux kernel, the following vulnerability has been resolved: ocfs2: clear extent cache after moving/defragmenting extents The extent map cache can become stale when extents are moved or defragmented, causing subsequent operations to see outdated extent flags. This triggers a BUG_ON in ocfs2_refcount_cal_cow_clusters(). The problem occurs when: 1. copy_file_range() creates a reflinked extent with OCFS2_EXT_REFCOUNTED 2. ioctl(FITRIM) triggers ocfs2_move_extents() 3. __ocfs2_move_extents_range() reads and caches the extent (flags=0x2) 4. ocfs2_move_extent()/ocfs2_defrag_extent() calls __ocfs2_move_extent() which clears OCFS2_EXT_REFCOUNTED flag on disk (flags=0x0) 5. The extent map cache is not invalidated after the move 6. Later write() operations read stale cached flags (0x2) but disk has updated flags (0x0), causing a mismatch 7. BUG_ON(!(rec->e_flags & OCFS2_EXT_REFCOUNTED)) triggers Fix by clearing the extent map cache after each extent move/defrag operation in __ocfs2_move_extents_range(). This ensures subsequent operations read fresh extent data from disk.
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) |
|---|---|---|---|---|---|
| 53069d4e76954e2e63c1b3c501051c6fbcf7298c | affected | git | 93166bc53c0e3587058327a4121daea34b4fecd5 | Unavailable | None listed |
| 53069d4e76954e2e63c1b3c501051c6fbcf7298c | affected | git | a7ee72286efba1d407c6f15a0528e43593fb7007 | Unavailable | None listed |
| 53069d4e76954e2e63c1b3c501051c6fbcf7298c | affected | git | 93b1ab422f1966b71561158e1aedce4ec100f357 | Unavailable | None listed |
| 53069d4e76954e2e63c1b3c501051c6fbcf7298c | affected | git | e92af7737a94a729225d2a5d180eaaa77fe0bbc1 | Unavailable | None listed |
| 53069d4e76954e2e63c1b3c501051c6fbcf7298c | affected | git | aa6a21409dd6221bb268b56bb410e031c632ff9a | Unavailable | None listed |
| 53069d4e76954e2e63c1b3c501051c6fbcf7298c | affected | git | bb69928ed578f881e68d26aaf1a8f6e7faab3b44 | Unavailable | None listed |
| 53069d4e76954e2e63c1b3c501051c6fbcf7298c | affected | git | a21750df2f6169af6e039a3bb4893d6c9564e48d | Unavailable | None listed |
| 53069d4e76954e2e63c1b3c501051c6fbcf7298c | affected | git | 78a63493f8e352296dbc7cb7b3f4973105e8679e | 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) |
|---|---|---|---|---|---|
| 3.0 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 3.0 | 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 |
| 6.6.115 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.56 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.17.6 | unaffected | semver | Unavailable | 6.17.* | None listed |
| 6.18 | unaffected | original_commit_for_fix | Unavailable | * | None listed |