hw/display/cirrus_vga_rop.h in QEMU (aka Quick Emulator) allows local guest OS privileged users to cause a denial of service (out-of-bounds read and QEMU process crash) via vectors related to copying VGA data via the cirrus_bitblt_rop_fwd_transp_ and cirrus_bitblt_rop_fwd_ functions.
git.qemu-project.org/?p=qemu.git%3Ba=commit%3Bh=215902d7b6fb50c6fc216fc74f770858278ed904
www.openwall.com/lists/oss-security/2017/04/19/4
www.securityfocus.com/bid/97957
access.redhat.com/errata/RHSA-2017:0980
access.redhat.com/errata/RHSA-2017:0981
access.redhat.com/errata/RHSA-2017:0982
access.redhat.com/errata/RHSA-2017:0983
access.redhat.com/errata/RHSA-2017:0984
access.redhat.com/errata/RHSA-2017:0988
access.redhat.com/errata/RHSA-2017:1205
access.redhat.com/errata/RHSA-2017:1206
access.redhat.com/errata/RHSA-2017:1430
access.redhat.com/errata/RHSA-2017:1431
access.redhat.com/errata/RHSA-2017:1441
bugzilla.redhat.com/show_bug.cgi?id=1443441
lists.debian.org/debian-lts-announce/2018/09/msg00007.html
security.gentoo.org/glsa/201706-03