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TI-2021-16171 Aliases CVE-2021-38576GHSA-h53v-fr53-7vvj

A BIOS bug in firmware for a particular PC model leaves the Platform authorization value…

Priority LOW 35Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

EPSS 0.01253 69th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—EDK IIedk2-stable202105, edk2-stable202102, edk2-stable202011, edk2-stable202008, edk2-stable202005, edk2-stable202002, edk2-stable201911, edk2-stable201908, edk2-stable201905, edk2-stable201903, edk2-stable201811, edk2-stable201808—No fix listedCNA
  • EDK II Vendor— Affected edk2-stable202105, edk2-stable202102, edk2-stable202011, edk2-stable202008, edk2-stable202005, edk2-stable202002, edk2-stable201911, edk2-stable201908, edk2-stable201905, edk2-stable201903, edk2-stable201811, edk2-stable201808 Fixed in — No fix listed CNA

CPE configurations NVD · 12

CPEVersionsRoleVendor
cpe:2.3:a:tianocore:edk2:201808:*:*:*:*:*:*:*201808VulnerableTianoCore
cpe:2.3:a:tianocore:edk2:201811:*:*:*:*:*:*:*201811VulnerableTianoCore
cpe:2.3:a:tianocore:edk2:201903:*:*:*:*:*:*:*201903VulnerableTianoCore
cpe:2.3:a:tianocore:edk2:201905:*:*:*:*:*:*:*201905VulnerableTianoCore
cpe:2.3:a:tianocore:edk2:201908:*:*:*:*:*:*:*201908VulnerableTianoCore
cpe:2.3:a:tianocore:edk2:201911:*:*:*:*:*:*:*201911VulnerableTianoCore
cpe:2.3:a:tianocore:edk2:202002:*:*:*:*:*:*:*202002VulnerableTianoCore
cpe:2.3:a:tianocore:edk2:202005:*:*:*:*:*:*:*202005VulnerableTianoCore
cpe:2.3:a:tianocore:edk2:202008:*:*:*:*:*:*:*202008VulnerableTianoCore
cpe:2.3:a:tianocore:edk2:202011:*:*:*:*:*:*:*202011VulnerableTianoCore
  • cpe:2.3:a:tianocore:edk2:201808:*:*:*:*:*:*:* Versions 201808 Vulnerable ·TianoCore
  • cpe:2.3:a:tianocore:edk2:201811:*:*:*:*:*:*:* Versions 201811 Vulnerable ·TianoCore
  • cpe:2.3:a:tianocore:edk2:201903:*:*:*:*:*:*:* Versions 201903 Vulnerable ·TianoCore
  • cpe:2.3:a:tianocore:edk2:201905:*:*:*:*:*:*:* Versions 201905 Vulnerable ·TianoCore
  • cpe:2.3:a:tianocore:edk2:201908:*:*:*:*:*:*:* Versions 201908 Vulnerable ·TianoCore
  • cpe:2.3:a:tianocore:edk2:201911:*:*:*:*:*:*:* Versions 201911 Vulnerable ·TianoCore
  • cpe:2.3:a:tianocore:edk2:202002:*:*:*:*:*:*:* Versions 202002 Vulnerable ·TianoCore
  • cpe:2.3:a:tianocore:edk2:202005:*:*:*:*:*:*:* Versions 202005 Vulnerable ·TianoCore
  • cpe:2.3:a:tianocore:edk2:202008:*:*:*:*:*:*:* Versions 202008 Vulnerable ·TianoCore
  • cpe:2.3:a:tianocore:edk2:202011:*:*:*:*:*:*:* Versions 202011 Vulnerable ·TianoCore
Show 2 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:tianocore:edk2:202102:*:*:*:*:*:*:*202102VulnerableTianoCore
cpe:2.3:a:tianocore:edk2:202105:*:*:*:*:*:*:*202105VulnerableTianoCore
  • cpe:2.3:a:tianocore:edk2:202102:*:*:*:*:*:*:* Versions 202102 Vulnerable ·TianoCore
  • cpe:2.3:a:tianocore:edk2:202105:*:*:*:*:*:*:* Versions 202105 Vulnerable ·TianoCore

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-38576
  2. 2026-10-03 Alias added: GHSA-h53v-fr53-7vvj

References

Advisory 1

  • TI-2026-79288 Out-of-bounds write in Google Brotli decoder KEVCVSS 4.0CRITICAL 9.2
  • TI-2023-24240 Buffer Overflow in EDK II Network Package CVSS 3.1HIGH 8.8
  • TI-2023-24238 Infinite loop in EDK II Network Package CVSS 3.1HIGH 7.5
  • TI-2023-24235 Buffer Overflow in EDK II Network Package CVSS 3.1HIGH 8.8
  • TI-2023-26565 An insecure default to allow UEFI Shell in EDK2 was left enabled in Ubuntu's EDK2. CVSS 3.1MEDIUM 6.7
  • TI-2023-24236 Out-of-Bounds Read in EDK II Network Package CVSS 3.1MEDIUM 6.5
See all 33 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences