CVE-2026-11623 (GCVE-0-2026-11623)
Vulnerability from cvelistv5 – Published: 2026-06-09 03:15 – Updated: 2026-06-23 04:49 X_Open Source
VLAI
EPSS
VEX
Title
tmux image.c image_free use after free
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/369303 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/369303/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-11623 | third-party-advisory |
| https://vuldb.com/submit/835623 | third-party-advisory |
| https://gist.github.com/XlabAITeam/f0d9952595f795… | exploit |
| https://github.com/tmux/tmux/commit/fc6d94a9f8a59… | patch |
| https://github.com/tmux/tmux/releases/tag/3.7-rc | patch |
| https://github.com/tmux/tmux/ | product |
Impacted products
Credits
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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