Trending
CVE-2021-41839

CVE detail

CVE-2021-41839

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.

CVSS 8.2 · HighBuzz score 32.5

Buzz score

Why this CVE is surfacing

Buzz score total 32.5

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 19.5 · diversity 13.0 · KEV 0.0 · OTX 0.0 · PoC 0.0

Mention score

19.5

6 evidence mentions in the snapshot

Diversity score

13.0

4 sources across 2 categories

KEV score

0.0

No KEV entry observed

OTX score

0.0

0 OTX pulses

PoC score

0.0

0 repos · best confidence N/A

Best PoC traction

Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions: 0; within the 30d window
Peak daily: 0; highest bucket

Evidence

Source links by recency

Newest mentions first

6 source links · newest first

https://cert-portal.siemens.com/productcert/html/ssa-306654.htmlcert-portal.siemens.com
No excerpt available.
Vendor Advisorycert-portal.siemens.comFeb 3, 2022, 2:15 AM
https://www.kb.cert.org/vuls/id/796611www.kb.cert.org
No excerpt available.
Exploitwww.kb.cert.orgFeb 3, 2022, 2:15 AM
https://www.insyde.com/security-pledge/SA-2022020www.insyde.com
No excerpt available.
Vendor Advisorywww.insyde.comFeb 3, 2022, 2:15 AM
https://www.insyde.com/security-pledgewww.insyde.com
No excerpt available.
Vendor Advisorywww.insyde.comFeb 3, 2022, 2:15 AM
https://security.netapp.com/advisory/ntap-20220217-0016/security.netapp.com
No excerpt available.
Exploitsecurity.netapp.comFeb 3, 2022, 2:15 AM
https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdfcert-portal.siemens.com
No excerpt available.
Vendor Advisorycert-portal.siemens.comFeb 3, 2022, 2:15 AM

Exploit code

Public exploit repository references

Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.

0 repository references · best confidence N/A · max 0 stars

No public PoC repositories have been matched yet.

Related records

Similar CVEs

6 related CVEs with shared weakness or product evidence

CVE-2021-41838
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…
CVSS 8.2 · High
6 mentions
CVE-2021-41837
An issue was discovered in AhciBusDxe in the kernel 5.0 through 5.5 in Insyde InsydeH2O. Because of an Untrusted Pointer Dereference that causes SMM memory corruption, an attacker…
CVSS 8.2 · High
6 mentions
CVE-2021-33627
An issue was discovered in Insyde InsydeH2O Kernel 5.0 before 05.09.11, 5.1 before 05.17.11, 5.2 before 05.27.11, 5.3 before 05.36.11, 5.4 before 05.44.11, and 5.5 before 05.52.11…
CVSS 8.2 · High
6 mentions
CVE-2021-33625
An issue was discovered in Kernel 5.x in Insyde InsydeH2O, affecting HddPassword. Software SMI services that use the Communicate() function of the EFI_SMM_COMMUNICATION_PROTOCOL d…
CVSS 7.5 · High
6 mentions
CVE-2025-15685
A flaw has been found in Open5GS up to 2.7.1. Affected by this vulnerability is an unknown functionality of the component freeDiameter. This manipulation causes memory corruption.…
CVSS 5.3 · Medium
6 mentions
CVE-2024-14044
A vulnerability was identified in Open5GS up to 2.7.1. This issue affects the function pcrf_rx_aar_cb of the file src/pcrf/pcrf-rx-path.c of the component Diameter Rx Handler. The…
CVSS 2.1 · Low
9 mentions

External lookup

Potential internet exposure

Potential exposure only — not proof of vulnerability.Shodan results indicate potentially internet-exposed products, not confirmed vulnerable systems. They do not confirm that any returned system is vulnerable to CVE-2021-41839.

Product-level CPE searches intentionally omit version fields and NVD version-range or configuration certainty. Verify the exact product version and configuration independently.

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Product CPE queries

Derived from this CVE's existing NVD CPE 2.3 records; the application, operating-system, or hardware part is retained.

cpe:2.3:a:insyde:insydeh2oSearch this product on Shodan

Exact CVE query

Eligible paid Shodan plan required

Shodan's exact vuln: filter is separate from the product searches above and requires an eligible paid Shodan plan.

vuln:CVE-2021-41839Search this CVE on Shodan

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Metadata

Canonical fields

NVD status

Modified

Published

Feb 3, 2022

Modified

Aug 11, 2026

Official record

Authoritative NVD record

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CWE IDs

Vendor classifications

How this vector reads

CVSS 3.1 base metrics decoded below. This explanation does not recalculate or change the NVD score.

Attack Vector (AV): Local. The attacker needs local access to the vulnerable system.
Attack Complexity (AC): Low. No special conditions beyond the attacker-controlled steps are required.
Privileges Required (PR): High. The attacker needs significant administrative privileges.
User Interaction (UI): None. Exploitation does not require another user to act.
Scope (S): Changed. Impacts can cross into a different security authority.
Confidentiality Impact (C): High. There is a total or serious impact to this security property.
Integrity Impact (I): High. There is a total or serious impact to this security property.
Availability Impact (A): High. There is a total or serious impact to this security property.

Signals

Exploitation indicators

0 stored signals · no KEV · 0 OTX pulses