CA SDM 12.9 CUM#1 has been posted to CA Support Online
You can find all of the 12.9 patches here
Please be advised that there are two (2) components for 12.9 CUM#1 - a LANGUAGE INDEPENDENT PATCH and a LANGUAGES PATCH.
Ensure that you review the readme files included with the patch and that ALL mandatory post install steps are taken.
As always, it is advisable to have a full/complete backup of the SDM environment prior to applying any patches AND to test in a non-PROD environment initially.
We would be interested in hearing your comments and experiences with 12.9 CUM#1.
Happy patching!