Time-of-check time-of-use race condition in the BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access.
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00688.html
https://cert-portal.siemens.com/productcert/html/ssa-686975.html