gnupg2 regression

USN-7412-1 fixed vulnerabilities in GnuPG. The update introduced a
regression. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

It was discovered that GnuPG incorrectly handled importing keys with
certain crafted subkey data. If a user or automated system were tricked
into importing a specially crafted key, a remote attacker may prevent
users from importing other keys in the future.