Red Hat and CentOS systems aren’t booting due to BootHole patches:
Early this morning, an urgent bug showed up at Red Hat's bugzilla bug tracker—a user discovered that the RHSA_2020:3216 grub2 security update and RHSA-2020:3218 kernel security update rendered an RHEL 8.2 system unbootable.
[...] The patches were intended to close a newly discovered vulnerability in the GRUB2 boot manager called BootHole.
[...] Unfortunately, Red Hat's patch to GRUB2 and the kernel, once applied, are leaving patched systems unbootable. The issue is confirmed to affect RHEL 7.8 and RHEL 8.2, and it may affect RHEL 8.1 and 7.9 as well. RHEL-derivative distribution CentOS is also affected.
Red Hat is currently advising users not to apply the GRUB2 security patches (RHSA-2020:3216 or RHSA-2020:3217) until these issues have been resolved.
Ubuntu and Debian are also apparently affected.
(Score: 3, Funny) by gawdonblue on Saturday August 01 2020, @01:00AM (2 children)
... until the patch patch comes out
(Score: 2) by The Vocal Minority on Saturday August 01 2020, @11:10AM (1 child)
I had literally just installed the Grub2 updates for my system before reading this :(
So yeah, might hold off on rebooting for a while...
(Score: 1, Insightful) by Anonymous Coward on Saturday August 01 2020, @08:41PM
yum downgrade your update to the last version you had installed. As long as the config files haven't been altered too much and you don't change install-only packages (like dbus or the new kernel or glibc or libc dependents) you'll be fine for the short term in case of accidental restart.