No, Valve is specifically noted for not having a kernel-driver anticheat in a landscape where most competitive games do use them. Notably, Easy Anti-Cheat, BattlEye, and Valorant's Vanguard all use kernel drivers, but no Valve Anti-Cheat has, because they've focused on server-side heuristics and crowed-sourced detection instead of trying to force the client to rat itself out.