CVE-2021-38576

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.

CVSS v3 7.5 HIGH
CVSS v2.0 7.8 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

7.8^/10

CVSS v2.0 : HIGH

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

Exploitability : 10.0 / Impact : 6.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact COMPLETE

References

Link	Resource
https://bugzilla.tianocore.org/show_bug.cgi?id=3499	Issue Tracking Permissions Required Third Party Advisory
https://bugzilla.tianocore.org/show_bug.cgi?id=3499	Issue Tracking Permissions Required Third Party Advisory
https://lists.debian.org/debian-lts-announce/2025/06/msg00007.html

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:tianocore:edk2:201808:::::::*
	cpe:2.3:a:tianocore:edk2:201811:::::::*
	cpe:2.3:a:tianocore:edk2:201903:::::::*
	cpe:2.3:a:tianocore:edk2:201905:::::::*
	cpe:2.3:a:tianocore:edk2:201908:::::::*
	cpe:2.3:a:tianocore:edk2:201911:::::::*
	cpe:2.3:a:tianocore:edk2:202002:::::::*
	cpe:2.3:a:tianocore:edk2:202005:::::::*
	cpe:2.3:a:tianocore:edk2:202008:::::::*
	cpe:2.3:a:tianocore:edk2:202011:::::::*
	cpe:2.3:a:tianocore:edk2:202102:::::::*
	cpe:2.3:a:tianocore:edk2:202105:::::::*

History

03 Nov 2025, 20:15

Type	Values Removed	Values Added
References		() https://lists.debian.org/debian-lts-announce/2025/06/msg00007.html -

Information

Published : 2022-01-03 22:15

Updated : 2025-11-03 20:15

NVD link : CVE-2021-38576

Mitre link : CVE-2021-38576

CVE.ORG link : CVE-2021-38576

JSON object : View

Products Affected

tianocore

edk2

CWE

NVD-CWE-noinfo

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