QEMU (aka Quick Emulator), when built with the VGA display emulator support, allows local guest OS privileged users to cause a denial of service (out-of-bounds read and QEMU process crash) via vectors involving display update.
https://usn.ubuntu.com/3575-1/
https://lists.gnu.org/archive/html/qemu-devel/2017-08/msg04684.html
https://bugzilla.redhat.com/show_bug.cgi?id=1486560
https://access.redhat.com/errata/RHSA-2018:2162
https://access.redhat.com/errata/RHSA-2018:1113
https://access.redhat.com/errata/RHSA-2018:1104
https://access.redhat.com/errata/RHSA-2018:0816
http://www.securityfocus.com/bid/100540
http://www.openwall.com/lists/oss-security/2017/08/30/3
http://www.debian.org/security/2017/dsa-3991
http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00042.html