CVE-2021-41838
HIGH
8.2
CVSS Score
Published: February 3, 2022 at 01:43 AM UTC
Updated: August 11, 2026 at 01:28 PM UTC
32 products affected across 2 vendorsInsydeH2OSIMATIC IPC477E FirmwareSIMATIC ITP1000 Firmware
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Severity
HIGH8.2
Exploit prediction
EPSS 0.3%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
5.1 ≤ v < 5.16.425.2 ≤ v < 5.26.425.3 ≤ v < 5.35.425.4 ≤ v < 5.43.425.5 ≤ v < 5.51.42
Affected range stops below 5.16.42, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.26.42, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.35.42, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.43.42, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.51.42, so it looks safe — our inference, not a vendor statement
v < V22.01.10
Affected range stops below V22.01.10, so it looks safe — our inference, not a vendor statement
siemens-simatic-field-pg-m5 (same device)
v < V26.01.13
Affected range stops below V26.01.13, so it looks safe — our inference, not a vendor statement
siemens-simatic-field-pg-m6 (same device)
v < V28.01.04
Affected range stops below V28.01.04, so it looks safe — our inference, not a vendor statement
siemens-simatic-ipc277g (same device)
v < V28.01.04
Affected range stops below V28.01.04, so it looks safe — our inference, not a vendor statement
siemens-simatic-ipc327g (same device)
v < V28.01.04
Affected range stops below V28.01.04, so it looks safe — our inference, not a vendor statement
siemens-simatic-ipc377g (same device)
v < V21.01.17
Affected range stops below V21.01.17, so it looks safe — our inference, not a vendor statement
siemens-simatic-ipc477e (same device)
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (6)
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdfx_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20220222-0001/x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.insyde.com/security-pledge/SA-2022023Source: af854a3a-2127-422b-91ae-364da2661108
https://www.kb.cert.org/vuls/id/796611Source: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
https://cert-portal.siemens.com/productcert/html/ssa-306654.htmlCVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- HIGH
- User Interaction
- NONE
- Scope
- CHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-119
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