Xen through 4.7.x allows local ARM guest OS users to cause a denial of service (host crash) via vectors involving a (1) data or (2) prefetch abort with the ESR_EL2.EA bit set.
www.openwall.com/lists/oss-security/2016/11/29/3
www.openwall.com/lists/oss-security/2016/12/05/7
www.securityfocus.com/bid/94581
www.securitytracker.com/id/1037358
xenbits.xen.org/xsa/advisory-201.html
xenbits.xen.org/xsa/xsa201-3-4.7.patch
xenbits.xen.org/xsa/xsa201-3.patch
security.gentoo.org/glsa/201612-56