Unrated severityNVD Advisory· Published Feb 2, 2022· Updated Nov 4, 2025
CVE-2021-43522
CVE-2021-43522
Description
An issue was discovered in Insyde InsydeH2O with kernel 5.1 through 2021-11-08, 5.2 through 2021-11-08, and 5.3 through 2021-11-08. A StorageSecurityCommandDxe SMM memory corruption vulnerability allows an attacker 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
2- Insyde/InsydeH2Odescription
Patches
Vulnerability mechanics
No source-code context for this CVE — mechanics is only generated when we can read the actual fix diff. Without that, the four sections (root cause, attack vector, affected code, fix) would be speculation rather than analysis.
References
3- cert-portal.siemens.com/productcert/pdf/ssa-306654.pdfmitrex_refsource_CONFIRM
- security.netapp.com/advisory/ntap-20220216-0003/mitrex_refsource_CONFIRM
- www.insyde.com/security-pledgemitrex_refsource_MISC
News mentions
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