========================================================================== 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
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