Drupal core announcements: 8.4.0 release candidate phase begins week of September 4; no Drupal 8.3.x or 7.x patch release planned
"The release candidate phase for the 8.4.0 minor release begins the week of September 4. Starting that week, the 8.4.x branch will be subject to patch release restrictions. Closer to the 8.4.0 release on October 4, we will limit the changes to critical bugfixes and other high-priority changes." 306
url:
https://groups.drupal.org/node/517395