Applying PAM 2.8.3 or 2.8.4 patches to an appliance that is integrated with Thales HSM may cause problems for the Password Management side of the product. This is because either of these two patches may overwrite configuration changes made for the HSM integration. A PAM administrator would find on the dashboard under "Elements Under Management" that the count for target accounts is missing.
This problem cannot be fixed by applying another patch. It can be corrected in a remote session with technical support right after the upgrade.
If you have PAM integrated with Thales HSM at a release lower than 2.8.3, or at 2.8.3 and you want to upgrade to 2.8.4, please open a support case prior to the upgrade to 2.8.3 or 2.8.4, and mention this post in the problem description.
Reference for support is DE331292.