CVE-2012-0218 Information

Description

Xen 3.4 4.0 and 4.1 when the guest OS has not registered a handler for a syscall or sysenter instruction does not properly clear a flag for exception injection when injecting a General Protection Fault which allows local PV guest OS users to cause a denial of service (guest crash) by later triggering an exception that would normally be handled within Xen.

Reference

http://lists.xen.org/archives/html/xen-announce/2012-06/msg00003.html http://secunia.com/advisories/55082 http://security.gentoo.org/glsa/glsa-201309-24.xml http://www.debian.org/security/2012/dsa-2501