CVE-2025-21691
MEDIUM EPSS 8.9%
Published Feb 10, 20251y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Published Feb 10, 2025 1y ago
Last Modified Jun 17, 2026 2w ago
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).
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High
Threat Intelligence
EPSS Exploit Probability
8.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available
Affected Products 3
References 4
- git.kernel.org https://git.kernel.org/stable/c/5f537664e705b0bf8b7e329861f20128534f6a83
- git.kernel.org https://git.kernel.org/stable/c/780ab8329672464984cf1344bd5c3993af0226c7
- git.kernel.org https://git.kernel.org/stable/c/7d6405c13b0d8a8367cd8df63f118b619a3f0dd2
- git.kernel.org https://git.kernel.org/stable/c/97153a05077f618f7471f50a78158602badccb30
Remediation
- git.kernel.org https://git.kernel.org/stable/c/5f537664e705b0bf8b7e329861f20128534f6a83
- git.kernel.org https://git.kernel.org/stable/c/780ab8329672464984cf1344bd5c3993af0226c7
- git.kernel.org https://git.kernel.org/stable/c/7d6405c13b0d8a8367cd8df63f118b619a3f0dd2
- git.kernel.org https://git.kernel.org/stable/c/97153a05077f618f7471f50a78158602badccb30