{"cve":"CVE-2021-41838","nvd":{"published":"2022-02-03T02:15:07.080","modified":"2026-08-11T13:17:20.243","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","score":8.2},"cwes":["CWE-119"],"references":["https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf","https://security.netapp.com/advisory/ntap-20220222-0001/","https://www.insyde.com/security-pledge","https://www.insyde.com/security-pledge/SA-2022023","https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf"],"products":["insyde:insydeh2o","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","siemens:simatic_ipc627e_firmware","siemens:simatic_ipc647e_firmware","siemens:simatic_ipc677e_firmware","siemens:simatic_ipc847e_firmware","siemens:simatic_itp1000_firmware"],"source":"nvd","synced_at":"2026-10-19T21:27:20.926095847+00:00"},"epss":{"cve":"CVE-2021-41838","score":0.00303,"percentile":0.23069,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}