CVE-2025-40307
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)
exfat: validate cluster allocation bits of the allocation bitmap
In the Linux kernel, the following vulnerability has been resolved: exfat: validate cluster allocation bits of the allocation bitmap syzbot created an exfat image with cluster bits not set for the allocation bitmap. exfat-fs reads and uses the allocation bitmap without checking this. The problem is that if the start cluster of the allocation bitmap is 6, cluster 6 can be allocated when creating a directory with mkdir. exfat zeros out this cluster in exfat_mkdir, which can delete existing entries. This can reallocate the allocated entries. In addition, the allocation bitmap is also zeroed out, so cluster 6 can be reallocated. This patch adds exfat_test_bitmap_range to validate that clusters used for the allocation bitmap are correctly marked as in-use.
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) |
|---|---|---|---|---|---|
| 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 | affected | git | 87f827d53bd0688597bda63ae95908e2ad39bac0 | Unavailable | None listed |
| 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 | affected | git | 67ce8034dc0278ddd88cad93d4218a945180dddd | Unavailable | None listed |
| 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 | affected | git | 6bc58b4c53795ab5fe00648344aa7d9d61175f90 | Unavailable | None listed |
| 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 | affected | git | 13c1d24803d5b0446b3f6f0fdd67e07ac1fdc7bf | Unavailable | None listed |
| 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 | affected | git | 79c1587b6cda74deb0c86fc7ba194b92958c793c | 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) |
|---|---|---|---|---|---|
| 5.7 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.7 | Unavailable | None listed |
| 6.1.183 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.148 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.58 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.17.8 | unaffected | semver | Unavailable | 6.17.* | None listed |
| 6.18 | unaffected | original_commit_for_fix | Unavailable | * | None listed |