It is a security update. Some of my Blogs do not have auto-update. So, manually update it by sign in.
WordPress 4.4.2 contains fixes for 19 bugs from 4.4 and 4.4.1, including:
- wp_list_comments ignores $comments parameter
- 4.4 Regression on Querying for Comments by Multiple Post Fields
- Pagination issue on front page after 4.4.1
See the complete list of changes on Trac
Keep WordPress more secure is one of the most important job for Site Administrating.