UnratedRed Hat & Ubuntu Linux
tmux vulnerability
USN-8428-1 Published Jun 15, 2026
CVE-2026-11623
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
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. Affected Ubuntu releases: 26.04. CVEs: CVE-2026-11623.
Affected versions
- Ubuntu 26.04
Official advisory · medium-confidence parse· fetched 4 hours ago·verify at source
Mitigation checklist
Recommended fix / mitigation
- Apply available updates: `sudo apt update && sudo apt upgrade` (a standard system update installs the fix).
Official advisory · medium-confidence parse· fetched 4 hours ago·verify at source
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