Linux's FineIBT Protections "Critically Flawed" Until Intel CPUs Appear With FRED

FineIBT is a Linux kernel initiative led by Intel engineers that aimed to combine the best of Intel Control-flow Enforcement Technology (CET) and Control Flow Integrity. FineIBT was merged in 2022 for the Linux 6.2 kernel as an alternative control flow integrity implementation. Some FineIBT weaknesses were previously addressed but now the implementation has been determined to be "critically flawed" at least until next-generation Intel processors appear with FRED...