CVE-2025-21691

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A vulnerability in the Linux kernel has been resolved, related to the

cachestat()

system call. The issue arose when

cachestat()

was added as a more convenient and performant version of

mincore()

, but it missed a fix for checking writability or ownership. This fix, initially applied to

mincore()

in a previous commit, has now been added to

cachestat()

with modifications for the file context.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.