Errata patches for X11 server and kernel mbuf handling have been released for OpenBSD 7.3 and 7.4.
Binary updates for the amd64, arm64 and i386 platform are available via the syspatch utility. Source code patches can be found on the respective errata page: https://www.openbsd.org/errata73.html https://www.openbsd.org/errata74.html