Memory leak in Xen 4.2 and unstable allows local HVM guests to cause a denial of service (host memory consumption) by performing nested virtualization in a way that triggers errors that are not properly handled.Referenceshttp://secunia.com/advisories/55082http://www.securitytracker.com/id/1028032http://security.gentoo.org/glsa/glsa-201309-24.xmlhttp://www.openwall.com/lists/oss-security/2013/01/23/8