The security hole, tracked as CVE-2021-0146 and rated high severity, impacts Pentium, Celeron and Atom CPUs on mobile, desktop and embedded devices. Affected Atom IoT processors are present in many cars, apparently including ones made by Tesla.

Intel announced the availability of fixes when it released its November 2021 Patch Tuesday updates.

“Hardware allows activation of test or debug logic at runtime for some Intel processors which may allow an unauthenticated user to potentially enable escalation of privilege via physical access,” Intel said in its advisory.