gnupg -- memory corruption vulnerability

Secunia reports:

A vulnerability has been reported in GnuPG, which can potentially
be exploited to compromise a vulnerable system.
The vulnerability is caused due to an error when importing keys
with duplicated IDs. This can be exploited to cause a memory
corruption when importing keys via --refresh-keys or --import.
Successful exploitation potentially allows execution of arbitrary
code, but has not been proven yet.