Heap Overflow in SmiVariable SMM Handler

AMI APTIOV contains vulnerabilities in BIOS where
privileged users may cause the “Heap-based Buffer Overflow” by local access.
Successful exploitation of this vulnerability may lead to a denial of service
during firmware update processing, such as a crash or failed update if the
out-of-bounds write hits unmapped memory. It could also impact Confidentiality,
Integrity, and Availability.