What’s Vulnerable › Vulnerabilities

CVE-2021-45970

• Severity: high (CVSS 8.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-01-05 · updated 2026-08-11
• Weakness: CWE-787

Description

An issue was discovered in IdeBusDxe in Insyde InsydeH2O with kernel 5.1 before 05.16.25, 5.2 before 05.26.25, 5.3 before 05.35.25, 5.4 before 05.43.25, and 5.5 before 05.51.25. A vulnerability exists in the SMM (System Management Mode) branch that registers a SWSMI handler that does not sufficiently check or validate the allocated buffer pointer (the status code saved at the CommBuffer+4 location).

Affected products

• Insydeh2O: from 5.1 before 5.16.25; from 5.2 before 5.26.25; from 5.3 before 5.35.25; from 5.4 before 5.43.25; from 5.5 before 05.51.25 — fixed in 05.51.25, 5.16.25, 5.26.25, 5.35.25, 5.43.25

How to fix

Upgrade to a fixed version: Insydeh2O 05.51.25, 5.16.25, 5.26.25, 5.35.25. Check the vendor advisory for mitigations.

References

• https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf
• https://security.netapp.com/advisory/ntap-20220216-0004/
• https://www.insyde.com/security-pledge
• https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf
• https://security.netapp.com/advisory/ntap-20220216-0004/
• https://www.insyde.com/security-pledge
• https://www.kb.cert.org/vuls/id/796611
• https://cert-portal.siemens.com/productcert/html/ssa-306654.html

Get alerted when CVE-2021-45970 or the next vulnerability affects your stack