CVE-2026-11623
tmux: tmux: Use-after-free vulnerability
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · June 9, 2026
Updated · September 1, 2026
Description
A flaw was found in tmux. A local attacker could exploit a use-after-free vulnerability in the image_free function, potentially leading to information disclosure or denial of service. Exploitation of this flaw is considered difficult due to its high complexity.
Statement
This flaw in tmux is rated as Low impact. Exploitation requires local access and is considered difficult due to the high complexity of the attack, limiting the risk to systems where an attacker already has user-level access. The vulnerability could lead to information disclosure or denial of service.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 4.2CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L
CWE-825 · Expired Pointer Dereference