Home / mailings

PDF

[USN-8428-1] tmux vulnerability

Posted on 15 June 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8428-1
June 15, 2026

tmux vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS

Summary:

tmux could be made to crash if it received specially crafted
input.

Software Description:
- tmux: terminal multiplexer

Details:

It was discovered that tmux incorrectly handled image cleanup, leading to
a use-after-free vulnerability. A local attacker could possibly use this
issue to cause tmux to crash, resulting in a denial of service.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 26.04 LTS
tmux 3.6a-2ubuntu0.1

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-8428-1
CVE-2026-11623

Package Information:
https://launchpad.net/ubuntu/+source/tmux/3.6a-2ubuntu0.1

--===============4380120141013556089==Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature

 

TOP