It’s recognized that Patch Tuesday updates can usually result in massive points and one thing similar to that occurred final 12 months in August. The safety replace had damaged dual-booting Home windows 11 and Linux methods as GNU distros like Debian, Ubuntu, Linux Mint, Zorin OS, Pet Linux, have been all affected.

A few days later, Microsoft offered a barely prolonged workaround that concerned tweaking round with insurance policies and the Registry with the intention to repair the issue. The corporate additionally defined that the foundation of the difficulty was a buggy SBAT (Safe Boot Superior Concentrating on) implementation within the Home windows 11 August Patch Tuesday KB5041585.

For many who could also be questioning, SBAT helps block outdated and doubtlessly susceptible bootloaders by checking the Safe Boot DBX. The Safe Boot DBX is a database of blacklisted UEFI executables. Microsoft defined:

After putting in the August 2024 Home windows safety replace, (KB5041585) or the August 2024 preview replace, you would possibly face points with booting Linux you probably have enabled the dual-boot setup for Home windows and Linux in your system. Ensuing from this problem, your system would possibly fail as well Linux and present the error message “Verifying shim SBAT knowledge failed: Safety Coverage Violation. One thing has gone severely unsuitable: SBAT self-check failed: Safety Coverage Violation.”

The August 2024 Home windows safety and preview updates apply a Safe Boot Superior Concentrating on (SBAT) setting to gadgets that run Home windows to dam outdated, susceptible boot managers. This SBAT replace won’t be utilized to gadgets the place twin booting is detected. On some gadgets, the dual-boot detection didn’t detect some custom-made strategies of dual-booting and utilized the SBAT worth when it mustn’t have been utilized.

The issue has been resolved this week with the most recent Could 2025 Patch Tuesday underneath KB5058405. This additionally occurs to be the primary Home windows 11 Hotpatch replace.