CVE-2021-38576

highpriority · track · 30EPSS 0.012 · 67 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.17% (67th) EPSS

CVSS 7.8 · high

Is it mine?

24 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-23

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

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.8

v2.07.8highAV:N/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 10 · impact 6.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-404US

affected products (24)

Products and version ranges known to be affected.

Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Fujitsu BIOSall versionscert_bundDEcpe:/a:fujitsu:bios:-
Insyde UEFI Firmwareall versionscert_bundDEcpe:/h:insyde:uefi:-
Lenovo BIOSall versionscert_bundDEcpe:/h:lenovo:bios:-
Lenovo Computerall versionscert_bundDEcpe:/h:lenovo:computer:-
n/a EDK II≤ edk2-stable202105, edk2-stable202102, edk2-stable202011, edk2-stable202008, edk2-stable202005, edk2-stable202002, edk2-stable201911, edk2-stable201908, edk2-stable201905, edk2-stable201903, edk2-stable201811, edk2-stable201808enisa_euvdEU
Tianocore edk2≤ 202111fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Special Edition≤ 4.7fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Special Edition≤ 1.7fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 12fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 11fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 10fstec_bduRU
tianocore edk2= 201808nvdUScpe:2.3:a:tianocore:edk2:*:*:*:*:*:*:*:*
tianocore edk2= 201811nvdUScpe:2.3:a:tianocore:edk2:*:*:*:*:*:*:*:*
tianocore edk2= 201903nvdUScpe:2.3:a:tianocore:edk2:*:*:*:*:*:*:*:*
tianocore edk2= 201905nvdUScpe:2.3:a:tianocore:edk2:*:*:*:*:*:*:*:*
tianocore edk2= 201908nvdUScpe:2.3:a:tianocore:edk2:*:*:*:*:*:*:*:*
tianocore edk2= 201911nvdUScpe:2.3:a:tianocore:edk2:*:*:*:*:*:*:*:*
tianocore edk2= 202002nvdUScpe:2.3:a:tianocore:edk2:*:*:*:*:*:*:*:*
tianocore edk2= 202005nvdUScpe:2.3:a:tianocore:edk2:*:*:*:*:*:*:*:*

showing 20 of 24

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-1451Insyde UEFI Firmware: Mehrere SchwachstellenDeutsch2023-06-13csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Insyde UEFI Firmware ausnutzen, um einen Denial of Service Angriff durchzuführen, Sicherheitsvorkehrungen zu umgehen oder Informationen offenzulegen.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund nvd NVD CVE.org MITRE

published 2022-01-03modified 2026-06-17

references (6)

External citations — patches, advisories, analysis.

scry

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