I noticed the below issue today.
I think it only affects certain configuration of dual booting so not too many people should be affected.
Does anyone know of people who have been affected?
 Distributions including Ubuntu, Debian, Linux Mint, Zorin OS, and Puppy Linux have all been affected by Microsoft’s patch.
Microsoft has been using Secure Boot in Windows for years, and made it a key 
requirement for Windows 11
 to use the technology to secure against BIOS rootkits. Researchers have
 found plenty of vulnerabilities in Secure Boot over the years, and 
recently it was discovered that Secure Boot is 
completely broken on many PCs.
George.