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TI-2026-10034 Aliases CVE-2026-11623GHSA-4cw9-jpqf-99x8

tmux image.c image_free use after free

Priority LOW 10CWE-119Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
High
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
Low · Low · Low
Fix status
Partial Red Hat: 6 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00124 2nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Partial tmux: 3.7-rcRed Hat: 6 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
—tmux3.6a3.7-rcPatch availableCNA
  • tmux Vendor— Affected 3.6a Fixed in 3.7-rc Patch available CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:tmux:tmux:*:*:*:*:*:*:*:*———
  • cpe:2.3:a:tmux:tmux:*:*:*:*:*:*:*:* Versions — — ·—

Remediation

  • Fix · CNA tmux Fixed in 3.7-rc

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 7AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 4AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 5AffectedNo fix yet: Fix deferred

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-11623
  2. 2026-10-03 Alias added: GHSA-4cw9-jpqf-99x8
  3. 2026-11-06 Affected versions changed · Red Hat

References

Exploit 1

Patch 2

Other 1

Sources

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