This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2021-3995 →

DEBIAN-CVE-2021-3995

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...

Original description

The description as published by the source.

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 an unprivileged local attacker to unmount FUSE filesystems that belong to certain other users who have a UID that is a prefix of the UID of the attacker in its string form. An attacker may use this flaw to cause a denial of service to applications that use the affected filesystems.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 util-linux

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.37.3-1"}]}]

Debian:13 util-linux

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.37.3-1"}]}]

Debian:14 util-linux

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.37.3-1"}]}]

References

advisory security-tracker.debian.org