Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2025-21691

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
10/02/2025
Last modified:
15/10/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> cachestat: fix page cache statistics permission checking<br /> <br /> When the &amp;#39;cachestat()&amp;#39; system call was added in commit cf264e1329fb<br /> ("cachestat: implement cachestat syscall"), it was meant to be a much<br /> more convenient (and performant) version of mincore() that didn&amp;#39;t need<br /> mapping things into the user virtual address space in order to work.<br /> <br /> But it ended up missing the "check for writability or ownership" fix for<br /> mincore(), done in commit 134fca9063ad ("mm/mincore.c: make mincore()<br /> more conservative").<br /> <br /> This just adds equivalent logic to &amp;#39;cachestat()&amp;#39;, modified for the file<br /> context (rather than vma).

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.5 (including) 6.6.75 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.7 (including) 6.12.12 (excluding)
cpe:2.3:o:linux:linux_kernel:6.13:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools