FreeBSD procfs Denial of Service Vulnerability
The FreeBSD Security Team has supplied a patch for this issue. It is recommended that users of the affected versions of the Operating System upgrade to a revision after the fix date, or apply the patch to the source tree and rebuild the system.
FreeBSD FreeBSD 3.5.1
FreeBSD FreeBSD 4.1
FreeBSD FreeBSD 4.1.1
FreeBSD FreeBSD 4.2