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CVE-2026-11623

tmux image.c image_free use after free

Published: Jun 9, 2026Updated: Jun 9, 2026 Sources: CVE List NVD
NVD MITRE
4.5CVSS
MEDIUM

A security vulnerability has been detected in tmux up to 3.6a. Affected is the function image_free of the file image.c. Such manipulation leads to use after free. Local access is required to approach this attack. This attack is characterized by high complexity. The exploitability is told to be difficult. The exploit has been disclosed publicly and may be used. Upgrading to version 3.7-rc is able to address this issue. The name of the patch is fc6d94a9f8a593bd8b7031650802084385d4ee03. The affected component should be upgraded.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:LAC:HPR:LUI:NS:UC:LI:LA:L
Exploitability
AV:LAttack Vector
Local
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:LAvailability
Low

Weaknesses

CWE-119CWE-416

Affected Products

tmux
n/a

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://gist.github.com/XlabAITeam/f0d9952595f795129a3258ba73bbc3cb
gist.github.com
https://github.com/tmux/tmux/
github.com
https://github.com/tmux/tmux/commit/fc6d94a9f8a593bd8b7031650802084385d4ee03
github.com
and 5 more references View all →

Timeline

Published
Jun 9, 2026
Last Updated
Jun 9, 2026

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