Errata patches for the kernel have been released for OpenBSD 6.4 and 6.5. Intel CPUs have another cross privilege side-channel attack. (SWAPGS)
Binary updates for the amd64 platform 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 As these affect the kernel, a reboot will be needed after patching.
