CVE-2021-38576

HIGH

7.5

CVSS Score

Published: January 3, 2022 at 09:07 PM UTC

Updated: June 17, 2026 at 04:02 AM UTC

1 product affected across 1 vendorEDK2

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Severity

HIGH7.5

Exploit prediction

EPSS 1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

EDK2 · Tianocore

95%

201808 201811 201903 201905 201908 201911 202002 202005 202008 202011 202102 202105 edk2-stable202105, edk2-stable202102, edk2-stable202011, edk2-stable202008, edk2-stable202005, edk2-stable202002, edk2-stable201911, edk2-stable201908, edk2-stable201905, edk2-stable201903, edk2-stable201811, edk2-stable201808

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

x_refsource_MISCIssue TrackingPermissions RequiredThird Party Advisory

Source: [email protected]

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

Source: af854a3a-2127-422b-91ae-364da2661108

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

CVSS

7.5HIGH[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

NVD-CWE-noinfo

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