Unsure if there are any currently publicly known exploits, but it sure isn't unheard of for VirtualBox: * http://arstechnica.com/security/2015/05/extremely-ser

Unsure if there are any currently publicly known exploits, but it sure isn't unheard of for VirtualBox: * http://arstechnica.com/security/2015/05/extremely-serious-virtual-machine-bug-threatens-cloud-providers-everywhere/ http://arstechnica.com/security/2015/05/extremely-serious-vi... * http://www.securityfocus.com/archive/1/495095 http://www.securityfocus.com/archive/1/495095 * https://www.cert.be/advisories/oracle-vm-virtualbox-two-privilege-escalation-vulnerabilities https://www.cert.be/advisories/oracle-vm-virtualbox-two-priv... * http://www.coresecurity.com/content/virtualbox-privilege-escalation-vulnerability http://www.coresecurity.com/content/virtualbox-privilege-esc...