Unspecified vulnerability in Oracle VM VirtualBox 4.0 allows local users to affect confidentiality, integrity, and availability via unknown vectors related to Extensions.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12576
https://exchange.xforce.ibmcloud.com/vulnerabilities/64810
http://www.vupen.com/english/advisories/2011/0152
http://www.securityfocus.com/bid/45876
http://www.oracle.com/technetwork/topics/security/cpujan2011-194091.html
http://security.gentoo.org/glsa/glsa-201204-01.xml