Heap-based buffer overflow in isakmpd on OpenBSD 3.4 through 3.6 allows local users to cause a denial of service (panic) and corrupt memory via IPSEC credentials on a socket.
https://exchange.xforce.ibmcloud.com/vulnerabilities/18486
http://www.securityfocus.com/bid/11928
http://www.openbsd.org/errata36.html