Wind River Support Network


LIN1021-2619 : Security Advisory - util-linux - CVE-2021-3996

Created: Jan 24, 2022    Updated: Aug 24, 2022
Resolved Date: Jun 8, 2022
Found In Version:
Fix Version:
Severity: Standard
Applicable for: Wind River Linux LTS 21
Component/s: Userspace


A logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem. This flaw allows a local user on a vulnerable system to unmount other users' filesystems that are either world-writable themselves (like /tmp) or mounted in a world-writable directory. An attacker may use this flaw to cause a denial of service to applications that use the affected filesystems.


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