Unrated severityNVD Advisory· Published Feb 3, 2022· Updated Nov 4, 2025
CVE-2021-33625
CVE-2021-33625
Description
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 do not check whether the address of the buffer is valid, which allows use of SMRAM, MMIO, or OS kernel addresses.
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
4- cert-portal.siemens.com/productcert/pdf/ssa-306654.pdfmitrex_refsource_CONFIRM
- security.netapp.com/advisory/ntap-20220222-0004/mitrex_refsource_CONFIRM
- www.insyde.com/security-pledgemitrex_refsource_MISC
- www.insyde.com/security-pledge/SA-2022014mitrex_refsource_MISC
News mentions
0No linked articles in our index yet.