'A recently released Red Hat update for the BootHole Vulnerability (firehose link) is causing systems to become unbootable. It is widely reported that updates to the shim, grub2 and kernel packages in RHEL and CentOS 7 and 8 are leaving various systems that use secure boot unbootable. Current recommendations are to avoid updating your system until the issue is resolved, or at least avoid updating the shim, grub2 and kernel packages. Update, shared by PAjamian: Red Hat is now recommending that users do not apply grub2, fwupd, fwupdate or shim updates until new packages are available.' -- source: https://linux.slashdot.org/story/20/07/31/158212 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, NZ +64 (7) 858-5174 http://www.cms.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/