Use After Free Affecting qemu-img package, versions <15:6.2.0-53.module+el8.10.0+23760+c0926e61.6


Severity

Recommended
medium

Based on CentOS security rating.

Threat Intelligence

EPSS
0.78% (52nd percentile)

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  • Snyk IDSNYK-CENTOS8-QEMUIMG-13286668
  • published5 Oct 2025
  • disclosed30 Sept 2025

Introduced: 30 Sep 2025

CVE-2025-11234  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Centos:8 qemu-img to version 15:6.2.0-53.module+el8.10.0+23760+c0926e61.6 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu-img package and not the qemu-img package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

A flaw was found in QEMU. If the QIOChannelWebsock object is freed while it is waiting to complete a handshake, a GSource is leaked. This can lead to the callback firing later on and triggering a use-after-free in the use of the channel. This can be abused by a malicious client with network access to the VNC WebSocket port to cause a denial of service during the WebSocket handshake prior to the VNC client authentication.

CVSS Base Scores

version 3.1