CVE-2021-38578

HIGHScheduled

Published:Mar 3, 2022(4 years ago)

Modified:Nov 3, 2025

Local AccessNo InteractionScope Changes

Vulnerability Description

Existing CommBuffer checks in SmmEntryPoint will not catch underflow when computing BufferSize.

Attack Characteristics

Local AccessHigh ComplexityHigh PrivilegesNo User Interaction

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AI analysis not yet available

Plain-English explanation, risk summary, and remediation steps will appear here once AI analysis is complete.

No Fix Known

No patch has been released yet. Apply workarounds or mitigations where available.

Affected Software

Vendor	Product	Versions	Fixed In
tianocore	edk2	202202	-
insyde	kernel	-	-
insyde	kernel	-

Timeline

Published
CVE disclosed publicly
Mar 3, 20224 years ago
Last Modified
Most recent update
Nov 3, 20256 months ago
Indexed to CVEInsight
Added to this platform
Mar 29, 20261 month ago

References

https://bugzilla.tianocore.org/show_bug.cgi?id=3387Issue Tracking
https://www.insyde.com/security-pledge/SA-2023024Third Party Advisory
https://bugzilla.tianocore.org/show_bug.cgi?id=3387Issue Tracking

CVSS Score

v3.1

7.4/ 10.0

HIGH

AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L

At a Glance

Affected Products

References

tianocore / edk2

CVE-2021-38578

Vulnerability Description

Attack Characteristics

Affected Software

Timeline

References

CVSS Score

At a Glance

Official Sources

CVSS v3 Vector

Impact Analysis

CVE-2021-38578

✦ Vulnerability Description

Attack Characteristics

Affected Software

Timeline

References

CVSS Score

At a Glance

Official Sources

CVSS v3 Vector

Impact Analysis

Vulnerability Description