Installed CU3 on our primary server with no problems. Used the server installer that was created from the update bundle on a couple of our secondary sites, and they fail with the same issue. Some details below. I also used the installer that was used on the primary (downloaded from MS) and same issue.
Info from the MSI log file:
MSI (s) (34:80) [20:41:34:927]: Note: 1: 1708
MSI (s) (34:80) [20:41:34:927]: Note: 1: 2205 2: 3: Error
MSI (s) (34:80) [20:41:34:927]: Note: 1: 2228 2: 3: Error 4: SELECT `Message` FROM `Error` WHERE `Error` = 1708
MSI (s) (34:80) [20:41:34:927]: Note: 1: 2205 2: 3: Error
MSI (s) (34:80) [20:41:34:927]: Note: 1: 2228 2: 3: Error 4: SELECT `Message` FROM `Error` WHERE `Error` = 1709
MSI (s) (34:80) [20:41:34:942]: Product: Cumulative Update 3 for Configuration Manager SP1 (KB2882125) -- Installation failed.
MSI (s) (34:80) [20:41:35:005]: Windows Installer installed the product. Product Name: Cumulative Update 3 for Configuration Manager SP1 (KB2882125). Product Version: 5.0.7804.1400. Product Language: 0. Manufacturer: Microsoft Corporation. Installation success
or error status: 1603.