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.

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.

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.

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.

Qemu-kvm: vnc websocket handshake use-after-free

A flaw was found in QEMU. If the QIOChannelWebsock object is freed whi ...

Security update for qemu

Moderate: virt:rhel and virt-devel:rhel security update

Moderate: qemu-kvm security update

Moderate: qemu-kvm security update

ELSA-2026-5578: virt:ol and virt-devel:ol security update (MODERATE)

ELSA-2026-18772: qemu-kvm security update (MODERATE)

ELSA-2026-1831: qemu-kvm security update (MODERATE)

Уязвимость эмулятора аппаратного обеспечения QEMU, связанная с использованием памяти после её освобождения, позволяющая нарушителю вызвать отказ в обслуживании

Security update for qemu

Security update for qemu

Security update for qemu

ELSA-2026-50118: virt:kvm_utils3 security update (MODERATE)

Security update for qemu

Security update for qemu