NULL Pointer Dereference Affecting libvirt package, versions <0:8.0.0-5.module+el8.6.0+847+b490afdd


Severity

Recommended
0.0
medium
0
10

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-ROCKY8-LIBVIRT-3219907
  • published5 Jan 2023
  • disclosed25 Jan 2022

Introduced: 25 Jan 2022

CVE-2021-4145  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:8 libvirt to version 0:8.0.0-5.module+el8.6.0+847+b490afdd or higher.
This issue was patched in RLSA-2022:1759.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libvirt package and not the libvirt package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:8 relevant fixed versions and status.

A NULL pointer dereference issue was found in the block mirror layer of QEMU in versions prior to 6.2.0. The self pointer is dereferenced in mirror_wait_on_conflicts() without ensuring that it's not NULL. A malicious unprivileged user within the guest could use this flaw to crash the QEMU process on the host when writing data reaches the threshold of mirroring node.

CVSS Scores

version 3.1