CVE-2021-41839

Severity CVSS v4.0:

Pending analysis

Type:

CWE-119 Buffer Errors

Publication date:

03/02/2022

Last modified:

04/11/2025

Description

An issue was discovered in NvmExpressDxe in the kernel 5.0 through 5.5 in Insyde InsydeH2O. Because of an Untrusted Pointer Dereference that causes SMM memory corruption, an attacker may be able to write fixed or predictable data to SMRAM. Exploiting this issue could lead to escalating privileges to SMM.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.20 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

8.20

Severity 3.x

HIGH

Vector 2.0

AV:L/AC:L/Au:N/C:P/I:P/A:P CVSS v2.0 Severity and Metrics:

Base Score: 4.60 MEDIUM
Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P

Attack Vector (AV): Local
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): Physical

Base Score 2.0

4.60

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:insyde:insydeh2o::::::::	5.1 (including)	5.16.25 (excluding)
cpe:2.3:a:insyde:insydeh2o::::::::	5.2 (including)	5.26.25 (excluding)
cpe:2.3:a:insyde:insydeh2o::::::::	5.3 (including)	5.35.25 (excluding)
cpe:2.3:a:insyde:insydeh2o::::::::	5.4 (including)	5.43.25 (excluding)
cpe:2.3:a:insyde:insydeh2o::::::::	5.5 (including)	5.51.25 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2021-41839

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools