The do_mmu_update function in arch/x86/mm.c in Xen 3.2.x through 4.4.x does not properly manage page references, which allows remote domains to cause a denial of service by leveraging control over an HVM guest and a crafted MMU_MACHPHYS_UPDATE.Referenceshttp://xenbits.xen.org/xsa/advisory-113.htmlhttps://security.gentoo.org/glsa/201504-04http://secunia.com/advisories/62672https://exchange.xforce.ibmcloud.com/vulnerabilities/98853http://www.debian.org/security/2015/dsa-3140http://www.securityfocus.com/bid/71207http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00005.htmlhttp://lists.opensuse.org/opensuse-security-announce/2015-02/msg00010.html
