OPENSUSE-SU-2021:0462-1 Security update for grub2

This update for grub2 fixes the following issues: grub2 implements the new 'SBAT' method for SHIM based secure boot revocation. bsc1182057 - CVE-2020-25632: Fixed a use-after-free in rmmod command bsc1176711 - CVE-2020-25647: Fixed an out-of-bound write in grubusbdeviceinitialize bsc1177883 -...