On a focal system all up-to-date, I installed these updates (and only these) from focal-proposed, and everything seems fine. System is booting as normal.
grub-common/focal-proposed 2.04-1ubuntu26.11 amd64 [upgradable from: 2.04-1ubuntu26.9] grub-efi-amd64-bin/focal-proposed 2.04-1ubuntu42 amd64 [upgradable from: 2.04-1ubuntu26.9] grub-efi-amd64-signed/focal-proposed 1.164+2.04-1ubuntu42 amd64 [upgradable from: 1.142.11+2.04-1ubuntu26.9] grub-efi-amd64/focal-proposed 2.04-1ubuntu42 amd64 [upgradable from: 2.04-1ubuntu26.9] grub2-common/focal-proposed 2.04-1ubuntu26.11 amd64 [upgradable from: 2.04-1ubuntu26.9] -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1917509 Title: Call for testing: grub2 security updates To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1917509/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs