Vulnerability CVE-2025-11234: Information
Description
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.
Severity: HIGH (7.5)
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Fixed packages
Package name | Branch | Fixed in version | Version from repository | Errata ID | Task # | State |
|---|---|---|---|---|---|---|
| qemu | sisyphus | 10.1.4-alt1 | 10.1.4-alt1 | ALT-PU-2026-3760-1 | 409502 | Fixed |
| qemu | sisyphus_riscv64 | 10.1.4-alt1 | 10.1.4-alt1 | ALT-PU-2026-3838-1 | - | Fixed |