The point release is happening today for Debian Buster 10.5. This is an important release because it incorporates all the recent security fixes from the latest GRUB / Secure Boot "Boothole" security problems.
Behind the scenes, there has been a lot of work to get this right: a release subject to an embargo to allow all the Linux releases to co-ordinate this as far as possible, lots of consistent effort, lots of cooperation - the very best of Free/Libre/Open Source working together.
Secure Boot shims are signed with a different key to go to upstream this time around: in due course, when revocation of old, insecure code happens to plug the security hole, older media may be deny-listed. All the updates for all the affected packages (listed in https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot/ ) are included in this release.
This has been a major wake-up call: the work behind the scenes has meant that each affected Linux distribution will be in a much better position going forward and working together is always good.