A double free memory issue was found to occur in the libvirt API, in versions before 6.8.0, 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. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-25637
• https://bugzilla.redhat.com/show_bug.cgi?id=1881037
• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00072.html
• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00073.html
• https://security.gentoo.org/glsa/202210-06
• https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html