Drush update not seeing the patch-level version of Drupal 8?
Does it appear that Drush update is not fetching the newest minor version update of Drupal 8? Changelog says 8.0.0 at the top, but you know 8.0.2 has been released, and
drush up or
drush upc says update information last refreshed that day yet says "No code updates available."?
drush status to see the current version including the third, patch-level, point version. You can also check composer.lock at "name": "drupal/core" for "version", e.g. "8.0.2".