CVE-2025-21691
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)
cachestat: fix page cache statistics permission checking
In the Linux kernel, the following vulnerability has been resolved: cachestat: fix page cache statistics permission checking When the 'cachestat()' system call was added in commit cf264e1329fb ("cachestat: implement cachestat syscall"), it was meant to be a much more convenient (and performant) version of mincore() that didn't need mapping things into the user virtual address space in order to work. But it ended up missing the "check for writability or ownership" fix for mincore(), done in commit 134fca9063ad ("mm/mincore.c: make mincore() more conservative"). This just adds equivalent logic to 'cachestat()', modified for the file context (rather than vma).
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) |
|---|---|---|---|---|---|
| cf264e1329fb0307e044f7675849f9f38b44c11a | affected | git | 7d6405c13b0d8a8367cd8df63f118b619a3f0dd2 | Unavailable | None listed |
| cf264e1329fb0307e044f7675849f9f38b44c11a | affected | git | 780ab8329672464984cf1344bd5c3993af0226c7 | Unavailable | None listed |
| cf264e1329fb0307e044f7675849f9f38b44c11a | affected | git | 97153a05077f618f7471f50a78158602badccb30 | Unavailable | None listed |
| cf264e1329fb0307e044f7675849f9f38b44c11a | affected | git | 5f537664e705b0bf8b7e329861f20128534f6a83 | 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) |
|---|---|---|---|---|---|
| 6.5 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 6.5 | Unavailable | None listed |
| 6.6.75 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.12 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.13.1 | unaffected | semver | Unavailable | 6.13.* | None listed |
| 6.14 | unaffected | original_commit_for_fix | Unavailable | * | None listed |