Subaru Keyfob Predictable Code
Subaru’s suffer from an issue where the rolling code used by the keyfob and car is predictable in the sense that it is not random. It is simply incremental. An attacker can ‘clone’ the keyfob and, unlock cars and, when increasing the rolling code with a sufficiently high value, effectively render the user’s keyfob unusable. Exploit code included.
Source: Subaru Keyfob Predictable Code