High severity8.2NVD Advisory· Published Feb 3, 2022· Updated Aug 11, 2026
CVE-2021-41838
CVE-2021-41838
Description
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 execute arbitrary code. This occurs because of a Numeric Range Comparison Without a Minimum Check.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
18- cpe:2.3:o:siemens:simatic_field_pg_m5_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_field_pg_m6_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_ipc127e_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_ipc227g_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_ipc277g_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_ipc327g_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_ipc377g_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_ipc427e_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_ipc477e_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_ipc627e_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_ipc647e_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_ipc677e_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_ipc847e_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_itp1000_firmware:*:*:*:*:*:*:*:*
- Insyde/InsydeH2Odescription
- Range: 5.0-5.5
Patches
Vulnerability mechanics
References
6- cert-portal.siemens.com/productcert/pdf/ssa-306654.pdfnvdThird Party Advisory
- security.netapp.com/advisory/ntap-20220222-0001/nvdThird Party Advisory
- www.insyde.com/security-pledgenvdVendor Advisory
- www.insyde.com/security-pledge/SA-2022023nvdVendor Advisory
- cert-portal.siemens.com/productcert/html/ssa-306654.htmlnvd
- www.kb.cert.org/vuls/id/796611nvd
News mentions
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