CVE-2026-11623

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.12% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 1.8% of scored records. A rank, not a probability.

NVD base score

1.1 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-07-23.

Red Hat severity

Low. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-06-09 03:15Z4 MO AGO

Last updated

2026-06-23 04:49Z4 MO AGO

Reserved

2026-06-08

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Low (CVSS 2.0)

CNA CVSS vector

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

Weaknesses

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass
• CWE-416Use After FreeVariant
• CWE-825Expired Pointer DereferenceBase

Data version

5.2

Document digest

0f8e5dd9a0460bf3981624c0d79b34d087f860774620d657510ccd93dd35788e

• vuldb.comVDB-369303 | tmux image.c image_free use after freehttps://vuldb.com/vuln/369303vdb-entrytechnical-description
• vuldb.comVDB-369303 | CTI Indicators (IOB, IOC, IOA)https://vuldb.com/vuln/369303/ctisignaturepermissions-required
• vuldb.comCVE-2026-11623 | CVE Analysis and Reporthttps://vuldb.com/cve/CVE-2026-11623third-party-advisory
• vuldb.comSubmit #835623 | tmux <= 3.6a Use After Freehttps://vuldb.com/submit/835623third-party-advisory
• gist.github.comhttps://gist.github.com/XlabAITeam/f0d9952595f795129a3258ba73bbc3cbexploit
• github.comhttps://github.com/tmux/tmux/commit/fc6d94a9f8a593bd8b7031650802084385d4ee03patch
• github.comhttps://github.com/tmux/tmux/releases/tag/3.7-rcpatch
• github.comhttps://github.com/tmux/tmux/product