It should be fixed in upstream 3.2.0, which is the release just after 3.0.25.
-- Informativa sulla Privacy: https://www.unibs.it/it/node/1452 <https://www.unibs.it/it/node/1452>
- Bug#1011041: freeradius FTBFS with OpenSSL 3.0 Adrian Bunk
- Bug#1011041: Fabio PEDRETTI
- Bug#1011041: marked as done (freeradius FT... Debian Bug Tracking System
