CVE-2020-15707

Integer overflows were discovered in the functions grub_cmd_initrd and
grub_initrd_init in the efilinux component of GRUB2, as shipped in Debian,
Red Hat, and Ubuntu (the functionality is not included in GRUB2 upstream),
leading to a heap-based buffer overflow. These could be triggered by an
extremely large number of arguments to the initrd command on 32-bit
architectures, or a crafted filesystem with very large files on any
architecture. An attacker could use this to execute arbitrary code and
bypass UEFI Secure Boot restrictions. This issue affects GRUB2 version 2.04
and prior versions.

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