The XPDM display driver in VMware ESXi 4.0, 4.1, and 5.0; VMware ESX 4.0 and 4.1; and VMware View before 4.6.1 allows guest OS users to gain guest OS privileges or cause a denial of service (NULL pointer dereference) via unspecified vectors.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17183
http://www.vmware.com/security/advisories/VMSA-2012-0005.html
http://www.vmware.com/security/advisories/VMSA-2012-0004.html
http://www.securitytracker.com/id?1026818
http://www.securitytracker.com/id?1026814
http://www.securityfocus.com/bid/52524
http://secunia.com/advisories/48379
http://secunia.com/advisories/48378
http://archives.neohapsis.com/archives/bugtraq/2012-03/0071.html