[singron]

It looks like this only affects DES passwords. Glibc has supported other hashing algorithms for a very long time and most Linux distros have used them by default for years. I don't think there is a way for an unprivileged user to choose DES if it's not the default, so it's very unlikely this can actually be triggered.

[gunapologist99]

Very good point. And, overriding defaults would mean that you have sufficient knowledge to know what not to choose. So, the practical impact of this is virtually nil.