Update: The full details of what has been addressed in this release can now be viewed on the BlackBerry Knowledge Base.
The March security patch for the BlackBerry Priv is now available to download. The update, which weighs in around 17MB, brings some additional security enhancements to the phone. At this time it is not known which vulnerabilities are addressed in this update, though Google is likely to announce full details at some point in the near future.
Be sure to stay tuned, as we will provide additional information when it is made available to us. For now, you can download and install the update by heading into your Settings -> About device and checking manually for the update.