Use After Free Affecting virt:rhel/libvirt-daemon-driver-nodedev package, versions <0:8.0.0-5.module+el8.6.0+14480+c0a3aa0f


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.05% (16th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications

Snyk Learn

Learn about Use After Free vulnerabilities in an interactive lesson.

Start learning
  • Snyk IDSNYK-RHEL8-VIRT-4261984
  • published31 Aug 2021
  • disclosed27 Aug 2021

Introduced: 27 Aug 2021

CVE-2021-3748  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade RHEL:8 virt:rhel/libvirt-daemon-driver-nodedev to version 0:8.0.0-5.module+el8.6.0+14480+c0a3aa0f or higher.
This issue was patched in RHSA-2022:1759.

NVD Description

Note: Versions mentioned in the description apply only to the upstream virt:rhel/libvirt-daemon-driver-nodedev package and not the virt:rhel/libvirt-daemon-driver-nodedev package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor's address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process.

CVSS Scores

version 3.1