As part of their Incremental Service Modelling , Microsoft have released SQL Server 2012 Service Pack 1 Cumulative Update #3.

This CU contains 38 fixes and is pertinent for versions 11.0.3000 – 11.0.3348 but is not for SQL Server 2012 RTM (11.0.2100 – 11.0.2999)

Please check that the hotfixes which are included in this cumulative update package are relevant to you, unlike the last CU2, which fixed a major bug , it is generally recommended that you only install a CU if one of the fixes is pertinent to you.