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USN-4618-1: tmux vulnerability

5 November 2020

tmux could be made to crash or execute arbitrary code if it received a specially crafted input.



  • tmux - terminal multiplexer


Sergey Nizovtsev discovered that tmux incorrectly handled some inputs.
An attacker could possibly use this issue to cause a crash or execute arbitrary code.

Update instructions

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

Ubuntu 20.10
Ubuntu 20.04

After a standard system update you need to restart tmux session to make
all the necessary changes.