WordPress 6.4.1 is now available as a maintenance release with four bug fixes.
You can read more by looking at the release notes: https://wordpress.org/news/2023/11/wordpress-6-4-1-maintenance-release/
You can also see a complete list of changes: https://core.trac.wordpress.org/query?status=closed&resolution=fixed&milestone=6.4.1&order=priority
If you have not done so already – download the update or simply use your existing installation of WordPress to update your site. Either way – this is an excellent time to make a backup copy of your site(s) before upgrading.