Description
Buffer overflow in copy.c in Mutt before 1.5.23 allows remote attackers to cause a denial of service (crash) via a crafted RFC2047 header line, related to address expansion.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | mutt | 1.5.22-2 | — |
| Debian 13 | mutt | 1.5.22-2 | — |
| Debian 12 | mutt | 1.5.22-2 | — |
| Debian 7 | mutt | 1.5.21-6.2+deb7u2 | DSA-2874-1 |
| Debian 6.0 | mutt | 1.5.20-9+squeeze3 | DSA-2874-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | mutt | 5:1.5.20-4.20091214hg736b6a.el6_5 | RHSA-2014:0304 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | mutt | 1.6.2-3.1 | openSUSE-SU-2024:10198-1 |
Advisories 3
- RHSA-2014:0304 Red Hat Security Advisory: mutt security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-2874-1 mutt - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10198-1 mutt-1.6.2-3.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- DSA-2874 vendor-advisory
- USN-2147-1 vendor-advisory
- RHSA-2014:0304 vendor-advisory
- 66165 vdb-entry
- http://www.mutt.org/doc/devel/ChangeLog
- SUSE-SU-2014:0471 vendor-advisory
- 1029919 vdb-entry
- openSUSE-SU-2014:0434 vendor-advisory
- openSUSE-SU-2014:0436 vendor-advisory