CVE-2021-3975

Published: Aug 23, 2022Modified: Jun 17, 2026

6.5

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitability: 2.8 / Impact: 3.6

Source: NVD

Description

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.

Affected (9)

Products: Redhat: Libvirt, Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions, Enterprise Linux Server Tus, Codeready Linux Builder · Canonical: Ubuntu Linux · Fedoraproject: Fedora · +2 more

Show all products

Redhat: Libvirt, Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions, Enterprise Linux Server Tus, Codeready Linux Builder · Canonical: Ubuntu Linux · Fedoraproject: Fedora · Debian: Debian Linux · Netapp: Ontap Select Deploy Administration Utility

Redhat

4 products

Libvirt

Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions

Enterprise Linux Server Tus

Codeready Linux Builder

1 product

1 product

1 product

1 product

Ontap Select Deploy Administration Utility

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Redhat Libvirt	Before 7.1.0

Configuration B

1 vulnerable

Vulnerable Software	Affected Versions
Canonical Ubuntu Linux	Version 21.10

Configuration C

1 vulnerable

Vulnerable Software	Affected Versions
Fedoraproject Fedora	Version 35

Configuration D

2 vulnerable

Vulnerable Software	Affected Versions
Redhat Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions	Version 8.6
Redhat Enterprise Linux Server Tus	Version 8.6

Configuration E

1 vulnerable · 6 platform

Vulnerable Software	Affected Versions
Redhat Codeready Linux Builder	All versions

Running on/with	Platform Versions
Redhat Enterprise Linux	Version 8.0
Redhat Enterprise Linux Eus	Version 8.6
Redhat Enterprise Linux For Ibm Z Systems	Version 8.0
Redhat Enterprise Linux For Ibm Z Systems Eus	Version 8.6
Redhat Enterprise Linux For Power Little Endian	Version 8.0
Redhat Enterprise Linux For Power Little Endian Eus	Version 8.6