Use After Free Affecting virt:rhel/qemu-kvm-docs package, versions <15:6.2.0-11.module_el8.6.0+2880+7d9e3703


Severity

Recommended
0.0
medium
0
10

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.24% (47th percentile)

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  • Snyk IDSNYK-ALMALINUX8-VIRT-5729535
  • published28 May 2023
  • disclosed10 May 2022

Introduced: 10 May 2022

CVE-2021-3975  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 virt:rhel/qemu-kvm-docs to version 15:6.2.0-11.module_el8.6.0+2880+7d9e3703 or higher.
This issue was patched in ALSA-2022:1759.

NVD Description

Note: Versions mentioned in the description apply only to the upstream virt:rhel/qemu-kvm-docs package and not the virt:rhel/qemu-kvm-docs package as distributed by AlmaLinux. See How to fix? for AlmaLinux: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 Base Scores

version 3.1