The vmsvga_fifo_run function in hw/display/vmware_vga.c in QEMU allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via a VGA command.
www.openwall.com/lists/oss-security/2016/05/30/2
www.securityfocus.com/bid/90928
www.ubuntu.com/usn/USN-3047-1
www.ubuntu.com/usn/USN-3047-2
bugzilla.redhat.com/show_bug.cgi?id=1336650
lists.debian.org/debian-lts-announce/2018/11/msg00038.html
lists.gnu.org/archive/html/qemu-devel/2016-05/msg05270.html
security.gentoo.org/glsa/201609-01