A NULL pointer dereference in vrend_renderer.c in virglrenderer through 0.8.0 allows guest OS users to cause a denial of service via malformed commands.
https://lists.debian.org/debian-lts-announce/2022/12/msg00017.html
https://gitlab.freedesktop.org/virgl/virglrenderer/commit/0d9a2c88dc3a70023541b3260b9f00c982abda16
https://bugzilla.redhat.com/show_bug.cgi?id=1765578
https://access.redhat.com/security/cve/cve-2019-18388
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00028.html