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.
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Debian Linux Security Advisory 2582-1 - Multiple denial of service vulnerabilities have been discovered in the xen hypervisor. One of the issues (CVE-2012-5513) could even lead to privilege escalation from guest to host.
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