Lenovo was notified of a potential denial of service vulnerability, affecting various versions of BIOS for Lenovo Desktop, Desktop - All in One, and ThinkStation, that could cause PCRs to be cleared intermittently after resuming from sleep (S3) on systems with Intel TXT enabled.

A vulnerability has been identified in some Lenovo products that use UEFI (BIOS) code developed by American Megatrends, Inc. (AMI). With this vulnerability, conditions exist where an attacker with administrative privileges or physical access to a system may be able to run specially crafted code that can allow them to bypass system protections such as Device Guard and Hyper-V.