Microsoft has release the CU update package 6 for SQL Server 2012 SP1. To apply this package in your environment, you must be running SQL Server 2012 SP1.
This cumulative update includes about 20 fixes dealing mostly with MDX queries and SSAS cubes. For more information on the updates included in this package, please visit http://support.microsoft.com/kb/2874879.
Because the builds are cumulative, each new update release contains all the hotfixes and all the security updates that were included with the previous SQL Server 2012 update release. The build number for this update is 11.0.3381.0
As a best practice, test this cummulative update in a staging server before proceeding to deploy in your production environment.