important · Boot chain — GIGABYTE
Root on affected GIGABYTE systems can reopen an embedded UEFI shell and bypass Secure Boot.
Affects
Certain GIGABYTE motherboards whose BIOS includes the affected AMI Aptio UEFI BDS module.
Redundant boot entries survive vulnerable cleanup, letting the shell alter Secure Boot policy in memory and load unverified pre-OS code.
Detail and 2 sources
The prerequisite remains administrative or root control; today’s addition is the GIGABYTE-specific root cause and scope, not a new initial foothold.