CVE-2021-38576 json
A BIOS bug in firmware for a particular PC model leaves the Platform authorization value empty.
published 2022-01-03 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-25018
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.3%
- EPSS 1.3% chance of exploitation in 30 days, percentile 69%
- public exploits
- 0
- none known
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.
Patch / fix
- edk2 Debian 14, Debian 13, Debian 12 2021.11-1
debian advisories DEBIAN-CVE-2021-38576
Exploit prediction
1.25% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 7.8 | AV:N/AC:L/Au:N/C:N/I:N/A:C |
Affected products
- n/a EDK II
References
-
bugzilla.tianocore.org
/show_bug.cgi?id=3499
issue-tracking, permissions-required, third-party-advisory
- lists.debian.org /debian-lts-announce/2025/06/msg00007.html
Sources
- CVE List CVE-2021-38576
- NVD CVE-2021-38576
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.