Linux Distros Unpatched Vulnerability : CVE-2021-3546

high Nessus Plugin ID 223839

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

- An out-of-bounds write vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions up to and including 6.0. The flaw occurs while processing the 'VIRTIO_GPU_CMD_GET_CAPSET' command from the guest. It could allow a privileged guest user to crash the QEMU process on the host, resulting in a denial of service condition, or potential code execution with the privileges of the QEMU process. (CVE-2021-3546)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

Plugin Details

Severity: High

ID: 223839

File Name: unpatched_CVE_2021_3546.nasl

Version: 1.3

Type: local

Agent: unix

Family: Misc.

Published: 3/5/2025

Updated: 9/10/2025

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.5

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2021-3546

CVSS v3

Risk Factor: High

Base Score: 8.2

Temporal Score: 7.1

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

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

Vulnerability Information

CPE: p-cpe:/a:centos:centos:qemu-kvm-block-ssh, p-cpe:/a:centos:centos:qemu-kvm-ui-opengl, p-cpe:/a:redhat:enterprise_linux:qemu-guest-agent, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:qemu-kvm-common, p-cpe:/a:redhat:enterprise_linux:qemu-kvm-core, p-cpe:/a:redhat:enterprise_linux:qemu-kvm-docs, p-cpe:/a:centos:centos:qemu-img, p-cpe:/a:centos:centos:qemu-kvm-block-gluster, p-cpe:/a:centos:centos:qemu-kiwi, p-cpe:/a:centos:centos:qemu-guest-agent, p-cpe:/a:centos:centos:qemu-kvm-hw-usbredir, p-cpe:/a:redhat:enterprise_linux:qemu-img, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:redhat:enterprise_linux:qemu-kvm-block-iscsi, p-cpe:/a:redhat:enterprise_linux:qemu-kvm-tests, p-cpe:/a:centos:centos:qemu-kvm-block-iscsi, p-cpe:/a:redhat:enterprise_linux:qemu-kvm-hw-usbredir, p-cpe:/a:centos:centos:qemu-kvm-docs, p-cpe:/a:redhat:enterprise_linux:qemu-kvm-block-rbd, p-cpe:/a:centos:centos:qemu-kvm, p-cpe:/a:centos:centos:qemu-kvm-ui-spice, p-cpe:/a:redhat:enterprise_linux:qemu-kiwi, cpe:/a:redhat:advanced_virtualization:8::el8, p-cpe:/a:centos:centos:qemu-kvm-block-curl, p-cpe:/a:redhat:enterprise_linux:qemu-kvm-block-gluster, p-cpe:/a:centos:centos:qemu-kvm-tests, p-cpe:/a:redhat:enterprise_linux:qemu-kvm-common, p-cpe:/a:redhat:enterprise_linux:qemu-kvm-block-curl, p-cpe:/a:redhat:enterprise_linux:qemu-kvm-ui-opengl, p-cpe:/a:redhat:enterprise_linux:qemu-kvm-ui-spice, p-cpe:/a:redhat:enterprise_linux:qemu-kvm, p-cpe:/a:centos:centos:qemu-kvm-block-rbd, p-cpe:/a:redhat:enterprise_linux:qemu-kvm-block-ssh, p-cpe:/a:centos:centos:qemu-kvm-core

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 6/2/2021

Reference Information

CVE: CVE-2021-3546

Detections

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