Microsoft has released SQL Server 2012 RTM Cumulative Update 4, which is build 11.00.2383.0. By my count, there are 25 fixes in the public fix list for this cumulative update.
The first four cumulative updates for SQL Server 2012 have all had relatively high numbers of fixes, which shows that the Sustained Engineering team has been busy fixing issues with SQL Server 2012.
This KB article shows all of the released, post SQL Server 2012 RTM build: The SQL Server 2012 builds that were released after SQL Server 2012 was released
Filed under: Microsoft, SQL Server 2012, SQL Server Denali Tagged: CU, Cumulative Updates 
