The vrend_decode_reset function in vrend_decode.c in virglrenderer before 0.6.0 allows local guest OS users to cause a denial of service (NULL pointer dereference and QEMU process crash) by destroying context 0 (zero).Referenceshttps://bugzilla.redhat.com/show_bug.cgi?id=1426170https://security.gentoo.org/glsa/201707-06https://lists.freedesktop.org/archives/virglrenderer-devel/2017-February/000145.htmlhttp://www.securityfocus.com/bid/96439http://www.openwall.com/lists/oss-security/2017/02/23/21https://cgit.freedesktop.org/virglrenderer/commit/?id=0a5dff15912207b83018485f83e067474e818bab
