UBUNTU-CVE-2026-11623

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Source
https://ubuntu.com/security/CVE-2026-11623
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-11623.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-11623
Upstream
  • CVE-2026-11623
Downstream
Related
Published
2026-06-09T05:16:00Z
Modified
2026-06-15T20:15:12.092493664Z
Severity
  • 4.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L CVSS Calculator
  • 1.1 (Low) CVSS_V4 - CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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.

References

Affected packages

Ubuntu:26.04:LTS / tmux

Package

Name
tmux
Purl
pkg:deb/ubuntu/tmux?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.6a-2ubuntu0.1

Affected versions

3.*
3.5a-3build1
3.6a-1
3.6a-2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "3.6a-2ubuntu0.1",
            "binary_name": "tmux"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-11623.json"