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util-linux versions through 2.41.5 and 2.42.2 fail to check mount helper exit status before running post-mount hooks, allowing unprivileged users to execute privileged operations on pre-existing filesystems. Attackers can exploit X-mount.idmap or X-mount.owner hooks to clone filesystems with inherited suid bits or modify target inode permissions after a helper fails, achieving privilege escalation.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade uuiddUpgrade util-linuxUpgrade libuuid-develUpgrade python3-libmountUpgrade libuuidUpgrade libfdiskUpgrade libblkidUpgrade libmountUpgrade libmount-develUpgrade libsmartcols-develUpgrade libfdisk-develUpgrade libsmartcolsUpgrade util-linux-coreUpgrade libblkid-devel | Nov 3, 2026 | Nov 2, 2026 |
| Alpine Linux | — | Upgrade util-linux | Sep 7, 2026 | Sep 3, 2026 |
| Redhat_linux | — | Upgrade libmount-debuginfoUpgrade util-linux-debugsourceUpgrade libuuid-develUpgrade libfdisk-debuginfoUpgrade libuuid-debuginfoUpgrade libsmartcols-debuginfoUpgrade uuidd-debuginfoUpgrade libfdiskUpgrade libsmartcolsUpgrade libsmartcols-develUpgrade libmount-develUpgrade util-linux-debuginfoUpgrade util-linux-coreUpgrade libblkidUpgrade libmountUpgrade util-linux-core-debuginfoUpgrade util-linuxUpgrade libfdisk-develUpgrade uuiddUpgrade libblkid-develUpgrade libuuidUpgrade libblkid-debuginfoUpgrade python3-libmountUpgrade python3-libmount-debuginfo | Nov 3, 2026 | Sep 2, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Sep 21, 2026 | Sep 3, 2026 |
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