The VGA module in QEMU improperly performs bounds checking on banked access to video memory, which allows local guest OS administrators to execute arbitrary code on the host by changing access modes after setting the bank register, aka the “Dark Portal” issue.
rhn.redhat.com/errata/RHSA-2016-0724.html
rhn.redhat.com/errata/RHSA-2016-0725.html
rhn.redhat.com/errata/RHSA-2016-0997.html
rhn.redhat.com/errata/RHSA-2016-0999.html
rhn.redhat.com/errata/RHSA-2016-1000.html
rhn.redhat.com/errata/RHSA-2016-1001.html
rhn.redhat.com/errata/RHSA-2016-1002.html
rhn.redhat.com/errata/RHSA-2016-1019.html
rhn.redhat.com/errata/RHSA-2016-1943.html
support.citrix.com/article/CTX212736
www.debian.org/security/2016/dsa-3573
www.openwall.com/lists/oss-security/2016/05/09/3
www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
www.securityfocus.com/bid/90316
www.securitytracker.com/id/1035794
www.ubuntu.com/usn/USN-2974-1
xenbits.xen.org/xsa/advisory-179.html
access.redhat.com/errata/RHSA-2016:1224
h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05164862
lists.gnu.org/archive/html/qemu-devel/2016-05/msg01197.html