Hello, SL7 published the latest fixes for the grub2 and shim boot issues to the sl-security repo. Normally bugfix packages are placed into sl- fastbugs. Due to the potential for the security errata to result in systems that cannot boot, the updated package was promoted to sl- security. Please install the latest updates from sl-security to receive the security fix for CVE-2020-10713 and a fix for the booting issue. Thanks, The Scientific Linux Team Current security packages for CVE-2020-10713: bpftool-3.10.0-1127.18.2.el7.x86_64.rpm fwupdate-12-6.el7.x86_64.rpm fwupdate-devel-12-6.el7.x86_64.rpm fwupdate-efi-12-6.el7.x86_64.rpm fwupdate-libs-12-6.el7.x86_64.rpm grub2-2.02-0.86.sl7_8.x86_64.rpm grub2-common-2.02-0.86.sl7_8.noarch.rpm grub2-efi-ia32-2.02-0.86.sl7_8.x86_64.rpm grub2-efi-ia32-cdboot-2.02-0.86.sl7_8.x86_64.rpm grub2-efi-ia32-modules-2.02-0.86.sl7_8.noarch.rpm grub2-efi-x64-2.02-0.86.sl7_8.x86_64.rpm grub2-efi-x64-cdboot-2.02-0.86.sl7_8.x86_64.rpm grub2-efi-x64-modules-2.02-0.86.sl7_8.noarch.rpm grub2-pc-2.02-0.86.sl7_8.x86_64.rpm grub2-pc-modules-2.02-0.86.sl7_8.noarch.rpm grub2-tools-2.02-0.86.sl7_8.x86_64.rpm grub2-tools-extra-2.02-0.86.sl7_8.x86_64.rpm grub2-tools-minimal-2.02-0.86.sl7_8.x86_64.rpm kernel-3.10.0-1127.18.2.el7.x86_64.rpm kernel-abi-whitelists-3.10.0-1127.18.2.el7.noarch.rpm kernel-debug-3.10.0-1127.18.2.el7.x86_64.rpm kernel-debug-devel-3.10.0-1127.18.2.el7.x86_64.rpm kernel-devel-3.10.0-1127.18.2.el7.x86_64.rpm kernel-doc-3.10.0-1127.18.2.el7.noarch.rpm kernel-headers-3.10.0-1127.18.2.el7.x86_64.rpm kernel-tools-3.10.0-1127.18.2.el7.x86_64.rpm kernel-tools-libs-3.10.0-1127.18.2.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-1127.18.2.el7.x86_64.rpm mokutil-15-8.sl7_8.x86_64.rpm perf-3.10.0-1127.18.2.el7.x86_64.rpm python-perf-3.10.0-1127.18.2.el7.x86_64.rpm shim-ia32-15-8.sl7_8.x86_64.rpm shim-unsigned-ia32-15-8.el7.x86_64.rpm shim-unsigned-x64-15-8.el7.x86_64.rpm shim-x64-15-8.sl7_8.x86_64.rpm