Lenovo implemented Intel CSME Anti-rollback ARB protections on some ThinkPad models to prevent roll back of CSME Firmware in flash.

An internal shell was included in BIOS image in some ThinkPad models that could allow escalation of privilege.

A potential vulnerability in the LenovoFlashDeviceInterface SMI handler may allow an attacker with local access and elevated privileges to execute arbitrary code.

An SMM driver input validation vulnerability in the BIOS of some ThinkPad models could allow an attacker with local access and elevated privileges to execute arbitrary code.

A potential vulnerability has been reported in Lenovo Power Management Driver versions prior to 1.67.17.48 leading to a buffer overflow which could cause a denial of service.