Fedora tmux 3.7b Update Addresses Use-After-Free Vulnerability

A use-after-free vulnerability (CVE-2026-11623) was identified in tmux affecting Fedora systems. The flaw could lead to crashes and potential exploitation if not patched. Fedora has released updates for both Fedora 43 and 44 to address this issue, specifically updating tmux to version 3.7b. The updates include fixes for several bugs, including a crash in break-pane when no name is provided. Users are advised to upgrade their tmux installations using the dnf update program. The vulnerability was published on June 9, 2026, and affects all users of tmux in Fedora distributions. The updates were made available on July 9, 2026, and are critical for maintaining system stability and security.

Key Points: • CVE-2026-11623 is a use-after-free vulnerability in tmux affecting Fedora systems. • Fedora 43 and 44 have released updates to version 3.7b to mitigate the vulnerability. • Users are urged to apply the updates using the dnf update program to ensure system security.