CVE-2021-38578

EUVD-2021-25020
Existing CommBuffer checks in SmmEntryPoint will not catch underflow when computing BufferSize.
Buffer Underflow
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.4 HIGH
LOCAL
HIGH
HIGH
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L
TianoCoreCNA
7.4 HIGH
LOCAL
HIGH
HIGH
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 19%
Affected Products (NVD)
VendorProductVersion
tianocoreedk2
𝑥
≤ 202202
insydekernel
5.0
insydekernel
5.1
insydekernel
5.2
insydekernel
5.3
insydekernel
5.4
insydekernel
5.5
𝑥
= Vulnerable software versions
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
impish
ignored
jammy
needed
kinetic
ignored
lunar
not-affected
mantic
not-affected
noble
not-affected
trusty
ignored
xenial
needs-triage