CVE-2021-41838

HIGH

InsydeH2O 5.1-5.5 - Unauthenticated Arbitrary Code Execution via SMM Callout

Title source: llm
STIX 2.1

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.

References (5)

Core 5
Core References
Vendor Advisory x_refsource_misc
https://www.insyde.com/security-pledge
Vendor Advisory x_refsource_misc
https://www.insyde.com/security-pledge/SA-2022023
Third Party Advisory x_refsource_confirm
https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20220222-0001/
Third Party Advisory, US Government Resource
https://www.kb.cert.org/vuls/id/796611

Scores

CVSS v3 8.2
EPSS 0.0006
EPSS Percentile 17.1%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Details

CWE
CWE-119
Status published
Products (15)
insyde/insydeh2o 5.1 - 5.16.42
siemens/simatic_field_pg_m5_firmware
siemens/simatic_field_pg_m6_firmware
siemens/simatic_ipc127e_firmware
siemens/simatic_ipc227g_firmware
siemens/simatic_ipc277g_firmware
siemens/simatic_ipc327g_firmware
siemens/simatic_ipc377g_firmware
siemens/simatic_ipc427e_firmware
siemens/simatic_ipc477e_firmware
... and 5 more
Published Feb 03, 2022
Tracked Since Feb 18, 2026