Unspecified vulnerability in Guest Additions in Sun xVM VirtualBox 1.6.x and 2.0.x before 2.0.12, 2.1.x, and 2.2.x, and Sun VirtualBox before 3.0.10, allows guest OS users to cause a denial of service (memory consumption) on the guest OS via unknown vectors.
http://sunsolve.sun.com/search/document.do?assetkey=1-66-271149-1
http://secunia.com/advisories/38420
http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00000.html