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Date: Fri, 2 Oct 2020 11:30:01 +0200
From: Mauro Matteo Cascella <>
Subject: CVE-2020-25637 libvirt: double free in
 qemuAgentGetInterfaces() in qemu_agent.c


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.

CVE-2020-25637 has been assigned for this flaw.

Fixed in libvirt v6.8.0 (2020-10-01).

Upstream commits:

Credit: Ilja Van Sprundel (IOActive).

Thank you,

Mauro Matteo Cascella, Red Hat Product Security
6F78 E20B 5935 928C F0A8  1A9D 4E55 23B8 BB34 10B0

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