Errata patches for unbound have been released for OpenBSD 6.4 and 6.5. Specially crafted queries may crash unwind and unbound.
Binary updates for the amd64, i386, and arm64 platforms are available via the syspatch utility. Source code patches can be found on the respective errata page: https://www.openbsd.org/errata64.html https://www.openbsd.org/errata65.html After patching, restart the unbound service.
