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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade perf6.12-debuginfoUpgrade kernel6.12-tools-debuginfoUpgrade python3-perf6.12-debuginfoUpgrade kernel-livepatch-6.12.63-84.121Upgrade kernel6.12-libbpf-staticUpgrade kernel6.12-libbpfUpgrade kernel6.12-libbpf-develUpgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel6.12-modules-extraUpgrade kernel6.12-modules-extra-commonUpgrade kernel6.12-libbpf-debuginfoUpgrade kernel6.12-headersUpgrade bpftool6.12-debuginfoUpgrade kernel6.12-tools-develUpgrade kernel6.12-develUpgrade kernel6.12-debuginfoUpgrade python3-perf6.12Upgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel6.12-toolsUpgrade kernel6.12Upgrade bpftool6.12Upgrade perf6.12 | Feb 20, 2026 | Dec 16, 2025 |
| Debian | — | Upgrade linux | Jul 23, 2026 | Jul 23, 2026 |
| Oracle_linux | — | Upgrade kernel-uek | Jan 15, 2026 | Dec 16, 2025 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 16, 2025 |
| Ubuntu | — | Upgrade linux-image-virtualUpgrade linux-image-aws-6.17Upgrade linux-image-oracle-6.17Upgrade linux-image-realtimeUpgrade linux-image-realtime-6.17Upgrade linux-image-oracleUpgrade linux-image-gcp-6.17Upgrade linux-image-oem-6.17Upgrade linux-image-6.17.0-1007-gcp-64kUpgrade linux-image-gcp-64kUpgrade linux-image-gcp-64k-6.17Upgrade linux-image-6.17.0-1008-raspiUpgrade linux-image-aws-64kUpgrade linux-image-6.17.0-14-genericUpgrade linux-image-awsUpgrade linux-image-raspiUpgrade linux-image-6.17.0-1007-aws-64kUpgrade linux-image-6.17.0-1006-realtimeUpgrade linux-image-generic-64kUpgrade linux-image-6.17.0-1007-gcpUpgrade linux-image-oracle-64k-6.17Upgrade linux-image-6.17.0-1008-azureUpgrade linux-image-6.17.0-14-generic-64kUpgrade linux-image-6.17.0-1007-awsUpgrade linux-image-generic-6.17Upgrade linux-image-gcpUpgrade linux-image-azure-6.17Upgrade linux-image-oracle-64kUpgrade linux-image-6.17.0-1007-oracle-64kUpgrade linux-image-aws-64k-6.17Upgrade linux-image-6.17.0-1011-oemUpgrade linux-image-azureUpgrade linux-image-6.17.0-1007-oracleUpgrade linux-image-virtual-6.17Upgrade linux-image-generic-64k-6.17Upgrade linux-image-genericUpgrade linux-image-raspi-6.17 | Feb 13, 2026 | Feb 12, 2026 |
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