An issue was discovered in Xen through 4.9.x allowing PV guest OS users to cause a denial of service (host OS crash) if shadow mode and log-dirty mode are in place, because of an incorrect assertion related to M2P.Referenceshttp://www.securitytracker.com/id/1040771https://xenbits.xen.org/xsa/advisory-251.htmlhttps://lists.debian.org/debian-lts-announce/2018/01/msg00003.htmlhttp://www.openwall.com/lists/oss-security/2017/12/12/5https://lists.debian.org/debian-lts-announce/2018/10/msg00009.htmlhttps://security.gentoo.org/glsa/201801-14http://www.securityfocus.com/bid/102175https://www.debian.org/security/2018/dsa-4112https://support.citrix.com/article/CTX232096
