Use After Free Affecting qemu-ui-spice-app package, versions <5.2.0-106.4


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server 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-SLES153-QEMUUISPICEAPP-2659551
  • published14 Apr 2022
  • disclosed3 Nov 2021

Introduced: 3 Nov 2021

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

How to fix?

Upgrade SLES:15.3 qemu-ui-spice-app to version 5.2.0-106.4 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu-ui-spice-app package and not the qemu-ui-spice-app package as distributed by SLES. See How to fix? for SLES:15.3 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