Hundreds of Millions of Dell PCs At Risk, Apply Patch Now! May 7, 2021 PC maker Dell has released a patch for five high-severity flaws discovered in the company’s firmware update driver impacting Dell desktops, laptops, notebooks, and tablets. This vulnerable firmware update driver has been released on hundreds of millions of Dell Windows PCs around the world since 2009. The multiple local privilege-escalation (LPE) bugs exist in Dell’s dbutil_2_3.sys driver, which comes pre-installed on most Dell machines running Windows. The firmware update driver component is responsible for Dell Firmware Updates via the Dell Bios Utility. The five high severity vulnerabilities in Dell software could allow attackers to escalate privileges from a non-administrator user to kernel mode privileges.