MICROSOFT UPDATE BREAKS DUAL-BOOT

Summary from the TLDR InfoSec newsletter

Microsoft's GRUB patch to fix CVE-2022-2601 has led to errors when trying to boot Linux partitions in dual-boot systems due to incompatible EFI boot loaders. The workaround for users on affected distros is to either disable Secure Boot or delete the Microsoft SBAT. Microsoft maintains that the update should only be installed on systems without a Linux boot option and has stated that it's working with Linux partners to address the issue.