Use After Free Affecting qemu-img package, versions <15:6.2.0-53.module+el8.10.0+90780+01092f9b.6


Severity

Recommended
medium

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.78% (52nd percentile)

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  • Snyk IDSNYK-ORACLE8-QEMUIMG-15351906
  • published25 Feb 2026
  • disclosed3 Oct 2025

Introduced: 3 Oct 2025

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

How to fix?

Upgrade Oracle:8 qemu-img to version 15:6.2.0-53.module+el8.10.0+90780+01092f9b.6 or higher.
This issue was patched in ELSA-2026-5578.

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 Oracle. See How to fix? for Oracle: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