Qemu-kvm: vnc websocket handshake use-after-free_CVE-2025-11234

7.5 / 10

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Basic Information

ID CVE-2025-11234

Source redhat

Published Oct 3, 2025 at 10:30

Affected Product

Vendor Red Hat

Product Red Hat Enterprise Linux 10

CWE Classification

CWE-416

References

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    "published": "2025-10-03T10:30:34.427Z",
    "modified": "2025-10-03T10:30:34.427Z",
    "type": "cve",
    "title": "Qemu-kvm: vnc websocket handshake use-after-free",
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