What were you trying to do that didn't work?

Boot a system with a Secure Boot signed UKI image, using https://wiki.archlinux.org/title/GRUB#Chainloading_a_unified_kernel_image in the GRUB config:

menuentry "UKI" {
	insmod fat
	insmod chain
	search --no-floppy --set=root --fs-uuid FILESYSTEM_UUID
	chainloader /EFI/Linux/uki.efi
}

What is the impact of this issue to you?

We can not boot signed UKI images from GRUB.

Please provide the package NVR for which the bug is seen:

I have not tried on RHEL 10.0 again but the last time I tried was in Fedora 41 or 42.

How reproducible is this bug?:

Always.

Steps to reproduce

1. Setup a system with a GRUB config poiting to a signed UKI image
2. Try to boot it

Expected results

System boots

Actual results

Backtrace (to be added soon)