FreeBSD 5.x, 4.x, and 3.x allows local users to cause a denial of service by executing a program with a malformed ELF image header.
https://exchange.xforce.ibmcloud.com/vulnerabilities/5967
http://www.securityfocus.com/bid/1625
http://archives.neohapsis.com/archives/freebsd/2000-08/0337.html