CVE-2006-5550
The kernel in FreeBSD 6.1 and OpenBSD 4.0 allows local users to cause a denial of service via unspecified vectors involving certain ioctl requests to /dev/crypto.
Date published : 2006-10-26
http://www.securityfocus.com/bid/20713
http://elegerov.blogspot.com/2006/10/here-is-lame-proof-of-concept-code-for.html