Buffer overflow in the backend framebuffer of XenSource Xen Para-Virtualized Framebuffer (PVFB) Message 3.0 through 3.0.3 allows local users to cause a denial of service (SDL crash) and possibly execute arbitrary code via "bogus screen updates," related to missing validation of the "format of messages."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10868
https://exchange.xforce.ibmcloud.com/vulnerabilities/42388
https://bugzilla.redhat.com/show_bug.cgi?id=443390
http://www.securitytracker.com/id?1020009
http://www.securityfocus.com/bid/29186