Use After Free Affecting qemu-guest-agent-debuginfo package, versions <17:10.1.0-17.el9_8


Severity

Recommended
medium

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.86% (57th percentile)

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  • Snyk IDSNYK-ROCKY9-QEMUGUESTAGENTDEBUGINFO-17053706
  • published29 May 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 Rocky-Linux:9 qemu-guest-agent-debuginfo to version 17:10.1.0-17.el9_8 or higher.
This issue was patched in RLSA-2026:18772.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu-guest-agent-debuginfo package and not the qemu-guest-agent-debuginfo package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:9 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