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

CVE-2021-41839

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.

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: >=5.1,<5.16.25
- (no CPE)range: 5.0-5.5
Insyde/InsydeH2Odescription

Patches

Vulnerability mechanics

References

cert-portal.siemens.com/productcert/pdf/ssa-306654.pdfnvdThird Party Advisory
security.netapp.com/advisory/ntap-20220217-0016/nvdThird Party Advisory
www.insyde.com/security-pledgenvdVendor Advisory
www.insyde.com/security-pledge/SA-2022020nvdVendor 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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