[UEFI] unable to reinstall grub from chroot

[joekamprad]

New GRUB2 security vulnerabilities affecting its UEFI Secure Boot support

see this https://www.phoronix.com/scan.php?page=news_item&px=GRUB-2021-Secure-Boot-Issues this CVE explains well this https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass2021 version https://git.savannah.gnu.org/cgit/grub.git ](https://git.savannah.gnu.org/cgit/grub.git