CVE-2021-38576

HIGHScheduled

Published:Jan 3, 2022(4 years ago)

Modified:Nov 3, 2025

Remote ExploitNo Auth RequiredNo InteractionLow Complexity

Vulnerability 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.

Attack Characteristics

Network AccessLow ComplexityNo Auth NeededNo User Interaction

🤖

AI analysis not yet available

Plain-English explanation, risk summary, and remediation steps will appear here once AI analysis is complete.

No Fix Known

No patch has been released yet. Apply workarounds or mitigations where available.

Affected Software

Vendor	Product	Versions	Fixed In
tianocore	edk2	-	-
tianocore	edk2	-	-
tianocore	edk2	-

Timeline

Published
CVE disclosed publicly
Jan 3, 20224 years ago
Last Modified
Most recent update
Nov 3, 20256 months ago
Indexed to CVEInsight
Added to this platform
Mar 29, 20261 month ago

References

https://bugzilla.tianocore.org/show_bug.cgi?id=3499Issue Tracking
https://bugzilla.tianocore.org/show_bug.cgi?id=3499Issue Tracking
https://lists.debian.org/debian-lts-announce/2025/06/msg00007.html

CVSS Score

v3.1

7.5/ 10.0

HIGH

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

At a Glance

Affected Products

References

tianocore / edk2

CVE-2021-38576

Vulnerability Description

Attack Characteristics

Affected Software

Timeline

References

CVSS Score

At a Glance

Official Sources

CVSS v3 Vector

Impact Analysis

CVE-2021-38576

✦ Vulnerability Description

Attack Characteristics

Affected Software

Timeline

References

CVSS Score

At a Glance

Official Sources

CVSS v3 Vector

Impact Analysis

Vulnerability Description