This is not a problem we can fix on our side. It is an upstream shim problem. Every distribution you want to boot will need a fixed shim, and it's not a priority right now, given that we have a moratorium on new shims being signed.
We have the ability to secure boot Ubuntu already, by not chainloading to shim, but directly to grub, which we agreed on doing a few months ago.
This is not a problem we can fix on our side. It is an upstream shim problem. Every distribution you want to boot will need a fixed shim, and it's not a priority right now, given that we have a moratorium on new shims being signed.
We have the ability to secure boot Ubuntu already, by not chainloading to shim, but directly to grub, which we agreed on doing a few months ago.