USN-8428-1: tmux vulnerability
Publication date
15 June 2026
Overview
tmux could be made to crash if it received specially crafted input.
Releases
Packages
- 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.
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
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 26.04 LTS resolute | tmux – 3.6a-2ubuntu0.1 | ||
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