CVE-2021-38576

high

Description

A BIOS bug in firmware for a particular PC model leaves the Platform authorization value empty. This can be used to permanently brick the TPM in multiple ways, as well as to non-permanently DoS the system.

References

https://lists.debian.org/debian-lts-announce/2025/06/msg00007.html

https://bugzilla.tianocore.org/show_bug.cgi?id=3499

Details

Source: Mitre, NVD

Published: 2022-01-03

Updated: 2025-11-03

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H