Georgi Guninski security advisory #47, 2001 - OpenBSD 2.8 and 2.9 have a race condition in the kernel which leads to local root compromise. By forking a few process it is possible to attach to +s pid with ptrace. Includes vvopenbsd.c, a local root exploit.
4688ad1afc259ebe9475d2938db6a97bb4b7bba11539103d8d09c14ea9d0232d