https://bugs.kde.org/show_bug.cgi?id=376563
--- Comment #3 from Guido Winkelmann <guido-kdeb...@unknownsite.de> --- I just had another look into the PEM file I imported, and I noticed something that could potentially, without having actually looked at the code, explain the out of control recursion: The Comodo CA certificate is signed by AddTrust External CA Root, which itself is cross signed by UTN - DATACorp SGC, meaning UTN - DATACorp SGC is itself again signed by AddTrust. This cross-signing thing is a fairly obscure feature of X.509 certificates that, until recently, was very rarely seen in the wild. If a programmer is not aware of this possibility, and didn't think to check X.509 trust paths for loops or at least limit the length of support trust chains, then trying to build a trust path for a certificate with such a cross-signed CA in there somewhere will usually lead to endless recursion. -- You are receiving this mail because: You are watching all bug changes.