CentOS Linux: CVE-2022-28737: Important: grub2, mokutil, shim, and shim-unsigned-x64 security update (Multiple Advisories)

There's a possible overflow in handle_image() when shim tries to load and execute crafted EFI executables; The handle_image() function takes into account the SizeOfRawData field from each section to be loaded. An attacker can leverage this to perform out-of-bound writes into memory. Arbitrary code execution is not discarded in such scenario.