Use After Free 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
0.3% (71st percentile)

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  • Snyk IDSNYK-ROCKY8-LIBVIRT-3219167
  • published5 Jan 2023
  • disclosed23 Aug 2022

Introduced: 23 Aug 2022

CVE-2021-3975  (opens in a new tab)
CWE-416  (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 use-after-free flaw was found in libvirt. The qemuMonitorUnregister() function in qemuProcessHandleMonitorEOF is called using multiple threads without being adequately protected by a monitor lock. This flaw could be triggered by the virConnectGetAllDomainStats API when the guest is shutting down. An unprivileged client with a read-only connection could use this flaw to perform a denial of service attack by causing the libvirt daemon to crash.

CVSS Scores

version 3.1