Samsung is rolling out a new software update for the Galaxy Note 8. This update brings the October 2019 security patch to the device. It may include some important security improvements for the device, which will keep it safe from security risks.
This update is currently rolling out in European countries but will expend to more regions very soon. The software version of this update is N950FXXU7DSJ1.
If you want to check for the update manually you can do this by heading into the Settings > Software update.