The 10th cumulative update release for SQL Server 2012 RTM is now available. Cumulative Update 10 contains all the hotfixes released since the initial release of SQL Server 2012 RTM.
Those who are facing severe issues with their environment can plan to test CU10 in the test environment & then move to production after satisfactory results.
KB Article For CU9 of SQL Server 2012
Previous Cumulative Update KB Articles of SQL Server 2012
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Reference : Rohit Garg (http://mssqlfun.com/)