An errata patch for the kernel has been released for OpenBSD 6.8 and OpenBSD 6.9.
In a specific configuration, wg(4) leaked mbufs. Binary updates for the amd64, i386 and arm64 platform are available via the syspatch utility. Source code patches can be found on the respective errata page: https://www.openbsd.org/errata68.html https://www.openbsd.org/errata69.html