Integer overflow in the VGA module in QEMU allows local guest OS users to cause a denial of service (out-of-bounds read and QEMU process crash) by editing VGA registers in VBE mode.Referenceshttp://xenbits.xen.org/xsa/advisory-179.htmlhttp://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmlhttp://rhn.redhat.com/errata/RHSA-2017-0621.htmlhttp://support.citrix.com/article/CTX212736https://lists.gnu.org/archive/html/qemu-devel/2016-05/msg01196.htmlhttp://www.openwall.com/lists/oss-security/2016/05/09/4http://www.securitytracker.com/id/1035794http://www.ubuntu.com/usn/USN-2974-1http://rhn.redhat.com/errata/RHSA-2016-2585.htmlhttp://www.debian.org/security/2016/dsa-3573http://www.securityfocus.com/bid/90314