The SQL Server team has released CU #4 for Service Pack 1.
- KB article: KB #2833645
- Build # is 11.0.3368
- This build has 39 fixes by my count.
For more information about this cumulative update, see the following posts:
- SQL Release Services Blog : Cumulative Update #4 for SQL Server 2012 SP1
Relevant for builds 11.0.3000 -> 11.0.3367. Do not attempt to install on SQL Server 2012 RTM (any build < 11.0.3000) or any previous version.