Vulnerability Description
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.
References
- https://git.kernel.org/stable/c/0e9be902041c6b9f0ed4b72764187eed1067a42f
- https://git.kernel.org/stable/c/b2e4cda71ed062c87573b016d2d956a62f4258ed
- https://git.kernel.org/stable/c/b623390045a81fc559decb9bfeb79319721d3dfb
FAQ
What is CVE-2025-68242?
CVE-2025-68242 is a documented vulnerability. 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...
How severe is CVE-2025-68242?
CVSS scoring is not yet available for CVE-2025-68242. Check NVD for updates.
Is there a patch for CVE-2025-68242?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.