What’s Vulnerable › Vulnerabilities

CVE-2021-38576

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-01-03 · updated 2026-06-17

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 products

• TianoCore edk2: 201808, 201811, 201903, 201905, 201908, 201911 (+6)

References

• https://bugzilla.tianocore.org/show_bug.cgi?id=3499
• https://bugzilla.tianocore.org/show_bug.cgi?id=3499
• https://lists.debian.org/debian-lts-announce/2025/06/msg00007.html

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