WordPress 6.4.3 is now available and contains 16 bug fixes and 2 security updates.
Since this release contains security fixes, it is recommended to update your site as soon as possible.
You can read more by looking at the release notes: https://wordpress.org/news/2023/12/wordpress-6-4-3-maintenance-security-release/
You can also see a complete list of changes: https://core.trac.wordpress.org/query?status=closed&resolution=fixed&milestone=6.4.3&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.