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CVE-2021-38576 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
https://bugzilla.tianocore.org/show_bug.cgi?id=3499	CVE	Issue TrackingPermissions RequiredThird Party Advisory
https://lists.debian.org/debian-lts-announce/2025/06/msg00007.html	CVE
https://bugzilla.tianocore.org/show_bug.cgi?id=3499	[email protected]	Issue TrackingPermissions RequiredThird Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
NVD-CWE-noinfo	Insufficient Information to Classify Weakness	[email protected]

Affected Products

Product	Versions
tianocore edk2	201808 201811 201903 201905 201908
CPE 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:::::::* Remediation No remediation found in references.

Product

Versions

tianocore edk2

201808

201811

201903

201905

201908

CPE

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:*:*:*:*:*:*:*

Remediation

No remediation found in references.

Change History

5 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 3, 2025	CVE Modified	CVE
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Jan 13, 2022	Initial Analysis	[email protected]