Directly from the Microsoft Release Service blog, here is the list of latest updates for SQL Server 2008 R2 SP2 and 2012 SP1/SP2:
SQL Server 2008 R2 SP2
SQL Server 2012 SP1
SQL Server 2012 SP2
Additionally, here is the SQL Server 2012 with SP2 Slipstream ISO image fix.
Stay Tuned! 🙂