An errata patch for the bgpd routing daemon has been released for OpenBSD 6.9.
During bgpd(8) config reloads prefixes of the wrong address family could leak to peers resulting in session resets. 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/errata69.html
