PT-2026-47640 · Tmux · Tmux

Xlabai · CVE-2026-11623 · Published 2026-06-09 · Updated 2026-06-15

Positive Technologies (AI Summary)

CVSS v3.1

4.5

Medium

Base vector

AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

Name of the Vulnerable Software and Affected Versions tmux versions prior to 3.7-rc

Description A use after free issue exists in the image free() function within the image.c file. This flaw requires local access to exploit and is characterized by high complexity and difficult exploitability.

Recommendations Upgrade to version 3.7-rc.

Exploit

Fix

Use After Free

Buffer Overflow

Weakness Enumeration

CWE-416

CWE-119

Related Identifiers

CVE-2026-11623

ECHO-472D-C4A6-C1F9

OPENSUSE-SU-2026:11006-1

USN-8428-1

Affected Products

Tmux

References · 23

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/11xxx/CVE-2026-11623.json · Exploit
• 🔥 https://gist.github.com/XlabAITeam/f0d9952595f795129a3258ba73bbc3cb · Exploit
• https://github.com/tmux/tmux/commit/fc6d94a9f8a593bd8b7031650802084385d4ee03 · Patch
• https://github.com/tmux/tmux/releases/tag/3.7-rc · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-11623 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-11623 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-11623 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2026:11006-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-11623 · Security Note
• https://ubuntu.com/security/notices/USN-8428-1 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-11623 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-11623 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-11623 · Vendor Advisory
• https://osv.dev/vulnerability/USN-8428-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-11623 · Vendor Advisory