CVE-2018-7738: Kernel Util-Linux

High severity, CVSS 7.8. EPSS: 0.4% chance of exploitation in the next 30 days.

In util-linux before 2.32-rc1, bash-completion/umount allows local users to gain privileges by embedding shell commands in a mountpoint name, which is mishandled during a umount command (within Bash) by a different user, as demonstrated by logging in as root and entering umount followed by a tab character for autocompletion.

Affected products

• Kernel Util-Linux: up to and including 2.31

Published 2018-03-07. Last modified 2026-06-17.