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util-linux

A vulnerability in util-linux allows a local unprivileged user to exploit restricted bind mounts by replacing the authorized source or a writable ancestor directory. This can redirect privileged mount operations to bind another host directory, potentially causing root to change ownership or mode on the redirected inode if certain mount options are set. The flaw affects multiple specific Ubuntu package versions of util-linux.

The flaw in util-linux involves restricted bind mounts that take the source path from fstab without pinning that source before a privileged mount operation. An unprivileged local user who can replace the authorized source or a writable ancestor directory can redirect the SUID mount(8) command to bind a different host directory. If the fstab entry includes options such as X-mount.owner, X-mount.group, or X-mount.mode, root will then apply ownership or mode changes to the redirected inode, potentially escalating privileges or altering system state.

A vulnerability in util-linux allows a local unprivileged user to exploit restricted bind mounts by replacing the authorized source or a writable ancestor directory. This can redirect privileged mount operations to bind another host directory, potentially causing root to change ownership or mode on 

A flaw was found in util-linux. (CVE-2026-78410)

Threats Tagged 'ubuntu-cve-2026-78410'

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Threats Tagged 'ubuntu-cve-2026-78410'

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