RHSA-2020:5040 — Security Advisory
Red Hat Security Advisory: libvirt security and bug fix update
Severity
ModerateRed Hat Product Security
Products
Official CSAF product identity
Published · November 10, 2020
Updated · June 28, 2026
Topic
An update for libvirt is now available for Red Hat Enterprise Linux 7.
Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
The libvirt library contains a C API for managing and interacting with the virtualization capabilities of Linux and other operating systems. In addition, libvirt provides tools for remote management of virtualized systems.
Security Fix(es):
- libvirt: double free in qemuAgentGetInterfaces() in qemu_agent.c (CVE-2020-25637)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Bug Fix(es):
- libvirt destroying macvtap device of running VM after a failed incoming migration of another VM with same macvtap "target device" (BZ#1868549)