Red Hat Security Advisory: grub2 security and bug fix update

CVE-2020-10713 — grub2: Crafted grub.cfg file can lead to arbitrary code execution during boot process CVE-2020-14308 — grub2: grub_malloc does not validate allocation size allowing for arithmetic overflow and subsequent heap-based buffer overflow CVE-2020-14309 — grub2: Integer overflow in grub_squash_read_symlink may lead to heap-based buffer overflow CVE-2020-14310 — grub2: Integer overflow read_section_as_string may lead to heap-based buffer overflow CVE-2020-14311 — grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer overflow CVE-2020-15705 — grub2: Fail kernel validation without shim protocol CVE-2020-15706 — grub2: Use-after-free redefining a function whilst the same function is already executing CVE-2020-15707 — grub2: Integer overflow in initrd size handling