CVE-2026-11623: Use After Free in tmux
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.
AI Analysis
Technical Summary
CVE-2026-11623 is a use-after-free vulnerability in the image_free function within the image.c file of tmux versions up to 3.6a. The vulnerability requires local access and has a high attack complexity, making exploitation difficult. A public exploit exists, but no known exploits are reported in the wild. The issue is fixed by upgrading to version 3.7-rc, with the patch identified by commit fc6d94a9f8a593bd8b7031650802084385d4ee03.
Potential Impact
The vulnerability could allow a local attacker to cause a use-after-free condition, potentially leading to undefined behavior or memory corruption. However, the low CVSS score and high complexity indicate limited practical impact and difficulty in exploitation.
Mitigation Recommendations
Upgrade tmux to version 3.7-rc or later to address this vulnerability. No other mitigations are specified or required.
CVE-2026-11623: Use After Free in tmux
Description
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.
CVSS v4.0
Score 2.0low
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-11623 is a use-after-free vulnerability in the image_free function within the image.c file of tmux versions up to 3.6a. The vulnerability requires local access and has a high attack complexity, making exploitation difficult. A public exploit exists, but no known exploits are reported in the wild. The issue is fixed by upgrading to version 3.7-rc, with the patch identified by commit fc6d94a9f8a593bd8b7031650802084385d4ee03.
Potential Impact
The vulnerability could allow a local attacker to cause a use-after-free condition, potentially leading to undefined behavior or memory corruption. However, the low CVSS score and high complexity indicate limited practical impact and difficulty in exploitation.
Mitigation Recommendations
Upgrade tmux to version 3.7-rc or later to address this vulnerability. No other mitigations are specified or required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-06-08T20:19:58.448Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a279b29e29bf47b503573a5
Added to database: 06/09/2026, 04:48:41 UTC
Last enriched: 06/23/2026, 14:15:41 UTC
Last updated: 07/31/2026, 19:22:57 UTC
Views: 46
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