Riskcovery

CVE-2025-21691

cachestat: fix page cache statistics permission checking

State
Published
Severity
Not scored
Published
Feb 10, 2025
Updated
May 11, 2026
Reserved
Dec 29, 2024

Read the record on cve.org

Description

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).

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • cf264e1329fb0307e044f7675849f9f38b44c11a to before 7d6405c13b0d8a8367cd8df63f118b619a3f0dd2Affected
  • cf264e1329fb0307e044f7675849f9f38b44c11a to before 780ab8329672464984cf1344bd5c3993af0226c7Affected
  • cf264e1329fb0307e044f7675849f9f38b44c11a to before 97153a05077f618f7471f50a78158602badccb30Affected
  • cf264e1329fb0307e044f7675849f9f38b44c11a to before 5f537664e705b0bf8b7e329861f20128534f6a83Affected
LinuxLinux
  • 6.5Affected
  • before 6.5Not affected
  • 6.6.75 through 6.6.*Not affected
  • 6.12.12 through 6.12.*Not affected
  • 6.13.1 through 6.13.*Not affected
  • 6.14 and laterNot affected

References

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