If you administer a RHEL or CentOS system and believe you may have installed these patches, do not reboot your system.
Fix-Revert
Downgrade the affected packages using
sudo yum downgrade shim\* grub2\* mokutil
and configure yum not to upgrade those packages by temporarily adding:
exclude=grub2* shim* mokutil
to /etc/yum.conf.
If you've already applied the patches and attempted (and failed) to reboot, boot from an RHEL or CentOS DVD in Troubleshooting mode, set up the network, then perform the same steps outlined above in order to restore functionality to your system
Ubuntu and Debian
Package grub2 updates already been pushed.
If you've already applied the patches and attempted (and failed) to reboot, boot from an RHEL or CentOS DVD in Troubleshooting mode, set up the network, then perform the same steps outlined above in order to restore functionality to your system
Ubuntu and Debian
Package grub2 updates already been pushed.
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