CVE-2009-1041 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-1041): The ktimer feature (sys/kern/kern_time.c) in FreeBSD 7.0, 7.1, and 7.2 allows local users to overwrite arbitrary kernel memory via an out-of-bounds timer value.
fixed in fbsd-sources-7.1-r1
thanks, closing.