CVE-2025-68242
In the Linux kernel, the following vulnerability has been resolved: NFS: Fix LTP test failures when timestamps are delegated The utimes01 and utime06 tests fail when delegated timestamps are enabled, specifically in subtests that modify the atime and mtime fields using the 'nobody' user ID. The problem can be reproduced as follow: # echo "/media *(rw,no_root_squash,sync)" >> /etc/exports # export -ra # mount -o rw,nfsvers=4.2 127.0.0.1:/media /tmpdir # cd /opt/ltp # ./runltp -d /tmpdir -s utimes01 # ./runltp -d /tmpdir -s utime06 This issue occurs because nfs_setattr does not verify the inode's UID against the caller's fsuid when delegated timestamps are permitted for the inode. This patch adds the UID check and if it does not match then the request is sent to the server for permission checking.
Affected versions
Linux kernel versions
6.11
and later are affected. Fixed in
6.12.59,
6.17.9,
6.18
and their respective stable series.
References
The following references provide additional information about CVE-2025-68242 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/0e9be902041c6b9f0ed4b72764187eed1067a42f
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PatchKernel patch commithttps://git.kernel.org/stable/c/b2e4cda71ed062c87573b016d2d956a62f4258ed
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PatchKernel patch commithttps://git.kernel.org/stable/c/b623390045a81fc559decb9bfeb79319721d3dfb
Frequently asked questions
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What is CVE-2025-68242?
CVE-2025-68242 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.11 onward and has been patched in 6.12.59, 6.17.9 and 6.18. CVE-2025-68242 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2025-68242?
Yes — CVE-2025-68242 has been patched. Fixed versions include 6.12.59, 6.17.9 and 6.18. If you are running Linux kernel 6.11 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-68242 actively exploited?
No — CVE-2025-68242 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.