On Linux, an application must request MPTCP when it opens a socket.

Ah nothing to worry about.

As of Go 1.24, Go programs do so by default for the sockets they listen on

Fuuuck

Fedora is at 7.2.13 today, so all good (so long as dnf-automatic is doing it’s thing and auto reboots are enabled).

If you build your own kernel, the fix is in Linux 5.10.272, 5.15.223, 6.1.190, 6.6.159, 6.12.113, 6.18.56, 7.2.10 and 7.3