CVE-2021-38578

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  2. Vulnerabilities (CVE)
  3. CVE-2021-38578

7.4 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 0.8 / Impact : 6.0

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact LOW

Scope CHANGED

7.5 /10

CVSS v2.0 : HIGH

V2 Legend

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

E

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

References
Link Resource
https://bugzilla.tianocore.org/show_bug.cgi?id=3387 Issue Tracking Vendor Advisory
https://www.insyde.com/security-pledge/SA-2023024 Third Party Advisory
https://bugzilla.tianocore.org/show_bug.cgi?id=3387 Issue Tracking Vendor Advisory
https://lists.debian.org/debian-lts-announce/2025/06/msg00007.html
https://www.insyde.com/security-pledge/SA-2023024 Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:tianocore:edk2:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR cpe:2.3:o:insyde:kernel:5.0:*:*:*:*:*:*:*
cpe:2.3:o:insyde:kernel:5.1:*:*:*:*:*:*:*
cpe:2.3:o:insyde:kernel:5.2:*:*:*:*:*:*:*
cpe:2.3:o:insyde:kernel:5.3:*:*:*:*:*:*:*
cpe:2.3:o:insyde:kernel:5.4:*:*:*:*:*:*:*
cpe:2.3:o:insyde:kernel:5.5:*:*:*:*:*:*:*
History

03 Nov 2025, 20:15

Type Values Removed Values Added
References
  • () https://lists.debian.org/debian-lts-announce/2025/06/msg00007.html -

21 Nov 2024, 06:17

Type Values Removed Values Added
References () https://bugzilla.tianocore.org/show_bug.cgi?id=3387 - Issue Tracking, Vendor Advisory () https://bugzilla.tianocore.org/show_bug.cgi?id=3387 - Issue Tracking, Vendor Advisory
References () https://www.insyde.com/security-pledge/SA-2023024 - Third Party Advisory () https://www.insyde.com/security-pledge/SA-2023024 - Third Party Advisory
CVSS v2 : 7.5
v3 : 9.8 		v2 : 7.5
v3 : 7.4

06 Aug 2024, 01:15

Type Values Removed Values Added
Summary (en) Existing CommBuffer checks in SmmEntryPoint will not catch underflow when computing BufferSize. (en) Existing CommBuffer checks in SmmEntryPoint will not catch underflow when computing BufferSize.
Information

Published : 2022-03-03 22:15

Updated : 2025-11-03 20:15

NVD link : CVE-2021-38578

Mitre link : CVE-2021-38578

CVE.ORG link : CVE-2021-38578

JSON object : View

Products Affected

tianocore

insyde

CWE
CWE-124

Buffer Underwrite ('Buffer Underflow')

CWE-787

Out-of-bounds Write