Xen 4.5.x and earlier enables certain default backends when emulating a VGA device for an x86 HVM guest qemu even when the configuration disables them, which allows local guest users to obtain access to the VGA console by (1) setting the DISPLAY environment variable, when compiled with SDL support, or connecting to the VNC server on (2) ::1 or (3) 127.0.0.1, when not compiled with SDL support.
openSUSE 13.1 openSUSE 13.2 SUSE Linux Enterprise Desktop 11 SP3 SUSE Linux Enterprise Desktop 12 SUSE Linux Enterprise Desktop 12 SP1 SUSE Linux Enterprise Server 11 SP3 SUSE Linux Enterprise Server 11 SP3 for Teradata SUSE Linux Enterprise Server 12 SUSE Linux Enterprise Server 12 SP1 SUSE Linux Enterprise Server for SAP Applications 12 SUSE Linux Enterprise Server for SAP Applications 12 SP1 SUSE Linux Enterprise Software Development Kit 11 SP3 SUSE Linux Enterprise Software Development Kit 12 SUSE Linux Enterprise Software Development Kit 12 SP1