| Headlines |
| 2020-08-03 |
GRUB security update renders Red Hat and CentOS systems unbootable |
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A remote computer rendered unbootable, a nightmare scenario for any system administrator, turned into a reality last week when a GRUB security update issued by Red Hat made some Red Hat Enterprise Linux and CentOS systems fail to load the GRUB boot menu: "Applying the RHSA-2020:3216 grub2 security update and the RHSA-2020:3218 kernel security and bug fix update on a fresh 'minimal' installation of RHEL 8.2 renders the system unbootable. Actual results:
system hangs after POST and the GRUB menu never loads. Expected results: system should display kernel version selection menu and then boot to RHEL." One reported workaround was to boot a live Linux image, chroot into the installed system and downgrade the shim-x64 and grub2 packages. Red Hat was eventually able to resolve the problem on Saturday by updating shim packages: "Red Hat has fixed the bug in the shim packages. Updated shim packages are now available and can be used in conjunction with previously released grub2, fwupd and fwupdate packages."
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