Errata patches have been released for OpenBSD 6.2 and 6.1. A local user could trigger a kernel panic by using an invalid TCB value.
Binary updates for the amd64 platform are available via the syspatch utility. Source code patches can be found on the respective errata pages: https://www.openbsd.org/errata61.html https://www.openbsd.org/errata62.html As this affects the kernel, a reboot will be needed after patching.
