A mutt security update has been released for Debian GNU/Linux 10 to address a memory leak flaw.

DSA 4838-1: mutt security update

- -------------------------------------------------------------------------
Debian Security Advisory DSA-4838-1 security@debian.org
  https://www.debian.org/security/ Salvatore Bonaccorso
January 25, 2021   https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : mutt
CVE ID : CVE-2021-3181
Debian Bug : 980326

Tavis Ormandy discovered a memory leak flaw in the rfc822 group recipient
parsing in Mutt, a text-based mailreader supporting MIME, GPG, PGP and
threading, which could result in denial of service.

For the stable distribution (buster), this problem has been fixed in
version 1.10.1-2.1+deb10u5.

We recommend that you upgrade your mutt packages.

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

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/