Linn Crosetto

The issue allows local users to simulate hardware errors, leading to a denial of service. This is due to the failure to disable APEI error injection through the `einj error inject` function in drivers/acpi/apei/einj.c when securelevel is set.

The issue allows local users to bypass intended Secure Boot restrictions and execute untrusted code by appending ACPI tables to the initrd when the system is booted with UEFI Secure Boot enabled.