https://www.debian.org/Bugs/Developer#severities
> serious > is a severe violation of Debian policy (roughly, it violates a must or > required directive), or, in the package maintainer's or release manager's > opinion, makes the package unsuitable for release. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org