Comment 4 for bug 1951490

Thanks Florian for checking, there are indeed patches for samba 4.14, 4.15, 4.16. No patches for samba 4.13, but maybe that's because upstream only ships security fixes for it at the moment [1].

A bit confusingly the upstream patches mention that:

  Note this is only really needed for 4.15 and older, as
  we no longer run the rpc_server embedded in smbd,
  but we better be consistent for now.

but a patch *does* exist for samba 4.16. We should verify if those patches apply to what we have in >= Focal and if they actually fix the bug.

[1] https://wiki.samba.org/index.php/Samba_Release_Planning