Logon to support.ca.com and navigate to product page and select "Privileged Access Management".
Click on the "LATEST MAINTENANCE RELEASES"
Click on "CA Privileged Access Manager"
Apply to PAM 2.8.x for upgrade as any other Patches.
But before that, check the following.
- VMWare Snapshot is taken.
- DB Backup is made (to external file system)
- Cluster is turned off
Next Article is PAM Upgrade from 188.8.131.52 to 3.0.0