Those who are facing severe issues with their environment, they can plan to test CU7 in test environment & then move to Production after satisfactory results.
KB Article For CU7 of SQL Server 2012
· CU#7 KB Article: http://support.microsoft.com/kb/2823247
Previous Cumulative Update KB Articles of SQL Server 2012
· CU#6 KB Article: http://support.microsoft.com/kb/2728897
· CU#5 KB Article: http://support.microsoft.com/kb/2777772
· CU#4 KB Article: http://support.microsoft.com/kb/2758687
· CU#3 KB Article: http://support.microsoft.com/kb/2723749
· CU#2 KB Article: http://support.microsoft.com/kb/2703275
· CU#1 KB Article: http://support.microsoft.com/kb/2679368
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Reference : Rohit Garg (http://mssqlfun.com/)