Tdklib64.sys Jun 2026

The file is primarily part of the utility, which manufacturers like Lenovo use to update the BIOS from within the Windows environment.

While the file is legitimate, specific older versions contain a critical flaw labeled CVE-2023-35841 . This vulnerability allows "Kernel Memory Access," meaning an attacker with basic user privileges could exploit this driver to gain full system control (Privilege Escalation). Common Issues and Symptoms Bios-Update-Problem - English Community - Lenovo Forums tdklib64.sys