Gentoo Linux Security Advisory 201309-24 – Multiple vulnerabilities have been found in Xen, allowing attackers on a Xen Virtual Machine to execute arbitrary code, cause Denial of Service, or gain access to data on the host. Versions less than 4.2.2-r1 are affected…. Gentoo Linux Security Advisory 201309-24 – Multiple vulnerabilities have been found in Xen, allowing attackers on a Xen Virtual Machine to execute arbitrary code, cause Denial of Service, or gain access to data on the host. Versions less than 4.2.2-r1 are affected.

Read more http://packetstormsecurity.com/files/123421/glsa-201309-24.txt