Errata patches for perl have been released for OpenBSD 6.0 and 6.1. A buffer over-read and heap overflow in perl's regexp may result in a crash or memory leak.
Binary updates for the amd64 and i386 platforms are available via the syspatch utility. Source code patches can be found on the respective errata pages: https://www.openbsd.org/errata60.html https://www.openbsd.org/errata61.html