Microsoft fixes Linux boot issues on dual-boot Windows systems

Microsoft has fixed a known issue preventing Linux from booting on dual-boot systems with Secure Boot enabled after installing the August 2024 Windows security updates. The list of affected systems includes those running client (Windows 10 and Windows 11) and server (Windows Server 2012 and later) OS versions. This issue is triggered by a Secure Boot Advanced Targeting (SBAT) update that blocks UEFI shim bootloaders vulnerable to exploits targeting the CVE-2022-2601 GRUB2 Secure Boot bypass. While Microsoft said in the CVE-2022-2601 advisory that this SBAT update would not be delivered to devices where dual booting is detected, it also acknowledged that the dual-boot detection failed to detect some customized methods of dual-booting and applied the update anyway. As revealed by many Linux users (running a wide range of distros, including but not limited to Ubuntu, Zorin OS, Linux Mint, and Puppy Linux), their systems stopped booting after installing the August 2024 Windows updates, ... Read full article.