Alibaba Cloud Linux 3 : 0076: qemu-kvm (ALINUX3-SA-2026:0076)

high Nessus Plugin ID 307690

Synopsis

The remote Alibaba Cloud Linux host is missing one or more security updates.

Description

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by a vulnerability as referenced in the ALINUX3-SA-2026:0076 advisory.

Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

CVE-2025-11234:
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.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

Plugin Details

Severity: High

ID: 307690

File Name: alinux3_sa_2026-0076.nasl

Version: 1.1

Type: Local

Family: Alibaba Cloud Linux Local Security Checks

Published: 4/21/2026

Updated: 4/21/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2025-11234

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:alibabacloud:alibaba_cloud_linux_3, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:qemu-guest-agent, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:qemu-img, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:qemu-kvm, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:qemu-kvm-block-curl, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:qemu-kvm-block-gluster, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:qemu-kvm-block-iscsi, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:qemu-kvm-block-rbd, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:qemu-kvm-block-ssh, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:qemu-kvm-common, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:qemu-kvm-core, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:qemu-kvm-docs, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:qemu-kvm-hw-usbredir, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:qemu-kvm-tests, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:qemu-kvm-ui-opengl, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:qemu-kvm-ui-spice, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:qemu-user-static

Required KB Items: Host/local_checks_enabled, Host/Alibaba/release, Host/Alibaba/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 4/14/2026

Vulnerability Publication Date: 10/3/2025

Reference Information

CVE: CVE-2025-11234

Detections

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