FreeBSD port programs that use libkvm for FreeBSD 4.6.2-RELEASE and earlier, including (1) asmon, (2) ascpu, (3) bubblemon, (4) wmmon, and (5) wmnet2, leave open file descriptors for /dev/mem and /dev/kmem, which allows local users to read kernel memory.
http://www.securityfocus.com/bid/5720
http://www.securityfocus.com/bid/5719
http://www.securityfocus.com/bid/5718
http://www.securityfocus.com/bid/5716
http://www.securityfocus.com/bid/5714
http://www.iss.net/security_center/static/10109.php
http://marc.info/?l=bugtraq&m=103228135413310&w=2
http://archives.neohapsis.com/archives/vulnwatch/2002-q3/0115.html