CVE-2021-38576

EUVD-2021-25018
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 48%
Debian logo
Debian Releases
Debian Product
Codename
edk2
bookworm
2022.11-6+deb12u1
fixed
bookworm (security)
2022.11-6+deb12u1
fixed
bullseye
no-dsa
bullseye (security)
vulnerable
buster
no-dsa
sid
2024.08-4
fixed
trixie
2024.08-4
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
edk2
bionic
needed
focal
needed
hirsute
ignored
impish
ignored
jammy
not-affected
kinetic
not-affected
lunar
not-affected
mantic
not-affected
noble
not-affected
trusty
ignored
xenial
needs-triage
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