I can confirm that the linked upstream patch fixes the issue (sudo works with non-resolvable hostname).
With the patch and `Defaults !fqdn`, no error or warning is shown/logged With the patch and `Defaults fqdn` (or without a Defaults line referring to fqdn, i.e. with a default sudoers file), a warning is shown when sudo is used, but it remain usable. Cheers, Sven Am Mi., 19. Jan. 2022 um 13:29 Uhr schrieb Sven Mueller <sven.muelle...@gmail.com>: > > Tags 1003969 + fixed-upstream patch confirmed > Thanks > > https://www.sudo.ws/repos/sudo/rev/8c6eaa503793 has the upstream patch.
