Phong Nguyen identified a severe bug in the way GnuPG creates and uses ElGamal keys for signing. This is a significant security failure which can lead to a compromise of almost all ElGamal keys used for signing. Note that this is a real world vulnerability which will reveal your private key within a few seconds.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/32293/000276.html
Source: https://packetstormsecurity.com/files/32293/000276.html.html