#VU116886 Use-after-free in QEMU - CVE-2025-11234

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Main Vulnerability Database Vulnerabilities #VU116886

#VU116886 Use-after-free in QEMU - CVE-2025-11234

Published: October 10, 2025


Vulnerability identifier: #VU116886
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-11234
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
QEMU
Software vendor:
QEMU

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a use-after-free error in websocket handshake code in /io/channel-websock.c. A remote attacker with network access to the VNC WebSocket port can perform a denial of service during the WebSocket handshake prior to the VNC client authentication.


Remediation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

External links