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Debian Security Advisory DSA-5055-1                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
January 24, 2022                      https://www.debian.org/security/faq
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Package        : util-linux
CVE ID         : CVE-2021-3995 CVE-2021-3996

The Qualys Research Labs discovered two vulnerabilities in util-linux's
libmount. These flaws allow an unprivileged user to unmount other users'
filesystems that are either world-writable themselves or mounted in a
world-writable directory (CVE-2021-3996), or to unmount FUSE filesystems
that belong to certain other users (CVE-2021-3995).

For the stable distribution (bullseye), these problems have been fixed in
version 2.36.1-8+deb11u1.

We recommend that you upgrade your util-linux packages.

For the detailed security status of util-linux please refer to its
security tracker page at:
https://security-tracker.debian.org/tracker/source-package/util-linux

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org

Debian: DSA-5055-1: util-linux security update

January 24, 2022
The Qualys Research Labs discovered two vulnerabilities in util-linux's libmount

Summary

For the stable distribution (bullseye), these problems have been fixed in
version 2.36.1-8+deb11u1.

We recommend that you upgrade your util-linux packages.

For the detailed security status of util-linux please refer to its
security tracker page at:
https://security-tracker.debian.org/tracker/source-package/util-linux

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org

Severity
The Qualys Research Labs discovered two vulnerabilities in util-linux's
libmount. These flaws allow an unprivileged user to unmount other users'
filesystems that are either world-writable themselves or mounted in a
world-writable directory (CVE-2021-3996), or to unmount FUSE filesystems
that belong to certain other users (CVE-2021-3995).

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