CVE-2021-41838 - Vulnerability Details - OpenCVE

Description

An issue was discovered in SdHostDriver in the kernel 5.0 through 5.5 in Insyde InsydeH2O. There is an SMM callout that allows an attacker to access the System Management Mode and execute arbitrary code. This occurs because of a Numeric Range Comparison Without a Minimum Check.

Published: 2022-02-03

Score: 8.2 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

cpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:*

Configuration 2 [-]

cpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:*

Configuration 3 [-]

cpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:*

Configuration 4 [-]

cpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:*

Configuration 5 [-]

cpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:*

Configuration 6 [-]

AND

cpe:2.3:o:siemens:simatic_field_pg_m5_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_field_pg_m5:-:*:*:*:*:*:*:*

Configuration 7 [-]

AND

cpe:2.3:o:siemens:simatic_field_pg_m6_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_field_pg_m6:-:*:*:*:*:*:*:*

Configuration 8 [-]

AND

cpe:2.3:o:siemens:simatic_ipc127e_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_ipc127e:-:*:*:*:*:*:*:*

Configuration 9 [-]

AND

cpe:2.3:o:siemens:simatic_ipc227g_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_ipc227g:-:*:*:*:*:*:*:*

Configuration 10 [-]

AND

cpe:2.3:o:siemens:simatic_ipc277g_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_ipc277g:-:*:*:*:*:*:*:*

Configuration 11 [-]

AND

cpe:2.3:o:siemens:simatic_ipc327g_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_ipc327g:-:*:*:*:*:*:*:*

Configuration 12 [-]

AND

cpe:2.3:o:siemens:simatic_ipc377g_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_ipc377g:-:*:*:*:*:*:*:*

Configuration 13 [-]

AND

cpe:2.3:o:siemens:simatic_ipc427e_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_ipc427e:-:*:*:*:*:*:*:*

Configuration 14 [-]

AND

cpe:2.3:o:siemens:simatic_ipc477e_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_ipc477e:-:*:*:*:*:*:*:*

Configuration 15 [-]

AND

cpe:2.3:o:siemens:simatic_ipc627e_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_ipc627e:-:*:*:*:*:*:*:*

Configuration 16 [-]

AND

cpe:2.3:o:siemens:simatic_ipc647e_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_ipc647e:-:*:*:*:*:*:*:*

Configuration 17 [-]

AND

cpe:2.3:o:siemens:simatic_ipc677e_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_ipc677e:-:*:*:*:*:*:*:*

Configuration 18 [-]

AND

cpe:2.3:o:siemens:simatic_ipc847e_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_ipc847e:-:*:*:*:*:*:*:*

Configuration 19 [-]

AND

cpe:2.3:o:siemens:simatic_itp1000_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_itp1000:-:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2021-28839	An issue was discovered in SdHostDriver in the kernel 5.0 through 5.5 in Insyde InsydeH2O. There is an SMM callout that allows an attacker to access the System Management Mode and execute arbitrary code. This occurs because of a Numeric Range Comparison Without a Minimum Check.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required High

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Local

Access Complexity Low

Authentication None

Confidentiality Impact Complete

Integrity Impact Complete

Availability Impact Complete

This CVE is not in the KEV list.

The EPSS score is 0.00301.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf
https://security.netapp.com/advisory/ntap-20220222-0001/
https://www.insyde.com/security-pledge
https://www.insyde.com/security-pledge/SA-2022023
https://www.kb.cert.org/vuls/id/796611

History

Tue, 04 Nov 2025 20:30:00 +0000

Type	Values Removed	Values Added
References		https://www.kb.cert.org/vuls/id/796611

Subscriptions

Insyde Insydeh2o

Siemens Simatic Field Pg M5 Simatic Field Pg M5 Firmware Simatic Field Pg M6 Simatic Field Pg M6 Firmware Simatic Ipc127e Simatic Ipc127e Firmware Simatic Ipc227g Simatic Ipc227g Firmware Simatic Ipc277g Simatic Ipc277g Firmware Simatic Ipc327g Simatic Ipc327g Firmware Simatic Ipc377g Simatic Ipc377g Firmware Simatic Ipc427e Simatic Ipc427e Firmware Simatic Ipc477e Simatic Ipc477e Firmware Simatic Ipc627e Simatic Ipc627e Firmware Simatic Ipc647e Simatic Ipc647e Firmware Simatic Ipc677e Simatic Ipc677e Firmware Simatic Ipc847e Simatic Ipc847e Firmware Simatic Itp1000 Simatic Itp1000 Firmware

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2022-02-03T01:43:30.000Z

Updated: 2025-11-04T19:12:35.317Z

Reserved: 2021-10-01T00:00:00.000Z

Link: CVE-2021-41838

Vulnrichment

No data.

NVD

Status : Modified

Published: 2022-02-03T02:15:07.080

Modified: 2026-06-17T04:08:59.723

Link: CVE-2021-41838

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer

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There is an SMM callout that allows an attacker to access the System Management Mode and execute arbitrary code. This occurs because of a Numeric Range Comparison Without a Minimum Check."}, {"lang": "es", "value": "Se ha descubierto un problema en SdHostDriver en el kernel versi\u00f3n 5.0 hasta la versi\u00f3n 5.5 en InsydeH2O. Hay una llamada SMM que permite a un atacante acceder al modo de gesti\u00f3n del sistema y ejecutar c\u00f3digo arbitrario. Esto ocurre debido a una comparaci\u00f3n de rango num\u00e9rico sin una comprobaci\u00f3n m\u00ednima."}], "id": "CVE-2021-41838", "lastModified": "2026-06-17T04:08:59.723", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.2, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.5, "impactScore": 6.0, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2022-02-03T02:15:07.080", "references": [{"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20220222-0001/"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://www.insyde.com/security-pledge"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://www.insyde.com/security-pledge/SA-2022023"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20220222-0001/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.insyde.com/security-pledge"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.insyde.com/security-pledge/SA-2022023"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.kb.cert.org/vuls/id/796611"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}], "source": "nvd@nist.gov", "type": "Primary"}]}