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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.

PUBLISHED Reserved 2025-12-16 | Published 2025-12-16 | Updated 2025-12-16 | Assigner Linux

Product status

Default status
unaffected

e12912d94137ab36ee704a91f465ff15c8b423da (git) before b2e4cda71ed062c87573b016d2d956a62f4258ed
affected

e12912d94137ab36ee704a91f465ff15c8b423da (git) before 0e9be902041c6b9f0ed4b72764187eed1067a42f
affected

e12912d94137ab36ee704a91f465ff15c8b423da (git) before b623390045a81fc559decb9bfeb79319721d3dfb
affected

Default status
affected

6.11
affected

Any version before 6.11
unaffected

6.12.59 (semver)
unaffected

6.17.9 (semver)
unaffected

6.18 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/b2e4cda71ed062c87573b016d2d956a62f4258ed

git.kernel.org/...c/0e9be902041c6b9f0ed4b72764187eed1067a42f

git.kernel.org/...c/b623390045a81fc559decb9bfeb79319721d3dfb

cve.org (CVE-2025-68242)

nvd.nist.gov (CVE-2025-68242)

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Data based on CVE®. Copyright © 1999-2025, The MITRE Corporation. All rights reserved.