Potential security vulnerabilities have been identified in the BIOS (UEFI Firmware) for certain HP PC products


A vulnerability has been
discovered in certain HP PC BIOS, which could allow for local arbitrary
code execution. The BIOS is a firmware which is used to provide runtime services
for operating systems and programs and to perform hardware initialization
during the booting process. Successful exploitation of this vulnerability
could allow for local arbitrary code execution with kernel level
privileges. An attacker could then install programs; view, change, or
delete data; or create new accounts with full user rights.


Threat Intelligence

A proof-of-concept writeup was
posted to GitHub on May 10, 2022
. However, there are no reports of active exploitation
of the vulnerability.


System Affected
This vulnerability is found in the BIOS of numerous HP systems. For a full
list of affected systems and BIOS versions, please click here:



– Large and medium government

– Small government entities: High



– Large and medium business
– Small business entities: High


Home Users: Low


Technical Summary

This vulnerability is exploited by
taking advantage of System Management Interrupt Handler (SMI Handler)’s
functionality to execute code from overwritten memory. The CVEs associated
with this vulnerability are: CVE-2021-3808 and CVE-2021-3809.



We recommend the following
actions be taken:


  • Upgrade to
    the latest version of the BIOS for systems affected.
  • Run all
    software as a non-privileged user (one without administrative
    privileges) to diminish the effects of a successful attack.