High severity8.2NVD Advisory· Published Feb 3, 2022· Updated Aug 11, 2026

CVE-2021-41840

Description

An issue was discovered in NvmExpressDxe 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 Inclusion of Functionality from an Untrusted Control Sphere.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Insyde/InsydeH2O2 versions
cpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:*range: >=5.2,<5.23.35
- (no CPE)range: 5.0-5.5
Insyde/InsydeH2Odescription
Insyde/NvmExpressDxellm-fuzzy
Range: 5.0-5.5

Patches

Vulnerability mechanics

References

cert-portal.siemens.com/productcert/pdf/ssa-306654.pdfnvdThird Party Advisory
security.netapp.com/advisory/ntap-20220217-0014/nvdThird Party Advisory
www.insyde.com/security-pledgenvdVendor Advisory
www.insyde.com/security-pledge/SA-2022018nvdVendor Advisory
cert-portal.siemens.com/productcert/html/ssa-306654.htmlnvd
www.kb.cert.org/vuls/id/796611nvd

News mentions

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cvss	0.533
epss	0.000
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ransomware	0.000