Comment # 1 on bug 1188952 from Knut Alejandro Anderssen Gonz���lez

This looks more like an enhancement than a bug, at least for me, of course, I'm
not an expert in the area and probably will need some research.

Yast2 is call using xdg-su so it will depends on the desktop, in case of KDE it
uses kdesu which does not use kwallet for storing or get any credential.