The emulated floppy disk controller in Bochs 2.3 allows local users of the guest operating system to cause a denial of service (virtual machine crash) via unspecified vectors, resulting in a divide-by-zero error.
https://exchange.xforce.ibmcloud.com/vulnerabilities/34513
http://www.vupen.com/english/advisories/2007/1936
http://www.securityfocus.com/bid/24246
http://taviso.decsystem.org/virtsec.pdf
http://security.gentoo.org/glsa/glsa-200711-21.xml
http://secunia.com/advisories/27715