CVE-2014-3880

The (1) execve and (2) fexecve system calls in the FreeBSD kernel 8.4
before p11, 9.1 before p14, 9.2 before p7, and 10.0 before p4 destroys the
virtual memory address space and mappings for a process before all threads
have terminated, which allows local users to cause a denial of service
(triple-fault and system reboot) via a crafted system call, which triggers
an invalid page table pointer dereference.