Race Condition Affecting virt:rhel/libvirt-daemon-driver-nodedev package, versions <0:8.0.0-5.2.module+el8.6.0+15256+3a0914fe


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.08% (35th percentile)

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  • Snyk IDSNYK-RHEL8-VIRT-4315387
  • published2 Apr 2022
  • disclosed28 Mar 2022

Introduced: 28 Mar 2022

CVE-2021-4207  (opens in a new tab)
CWE-362  (opens in a new tab)
CWE-120  (opens in a new tab)

How to fix?

Upgrade RHEL:8 virt:rhel/libvirt-daemon-driver-nodedev to version 0:8.0.0-5.2.module+el8.6.0+15256+3a0914fe or higher.
This issue was patched in RHSA-2022:5821.

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 flaw was found in the QXL display device emulation in QEMU. A double fetch of guest controlled values cursor-&gt;header.width and cursor-&gt;header.height can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer overflow. A malicious privileged guest user could use this flaw to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process.

CVSS Scores

version 3.1