Arch Linux 764 Published by

A libvirt security update has been released for Arch Linux.

ASA-202101-42: libvirt: arbitrary code execution

Arch Linux Security Advisory ASA-202101-42
Severity: Critical
Date : 2021-01-29
CVE-ID : CVE-2020-25637
Package : libvirt
Type : arbitrary code execution
Remote : No
Link :

The package libvirt before version 1:7.0.0-1 is vulnerable to arbitrary
code execution.

Upgrade to 1:7.0.0-1.

# pacman -Syu "libvirt>=1:7.0.0-1"

The problem has been fixed upstream in version 7.0.0.


A double free memory issue was found to occur in the libvirt API
responsible for requesting information about network interfaces of a
running QEMU domain. This flaw affects the polkit access control
driver. Specifically, clients connecting to the read-write socket with
limited ACL permissions could use this flaw to crash the libvirt
daemon, resulting in a denial of service, or potentially escalate their
privileges on the system.

A malicious user could query the API in a way that could result in a
code execution flaw.