CVE-2021-41842

Name: CVE-2021-41842
Creator: NVD / NIST
Published: 2022-01-06T00:15:07.86+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.53%

Last modified Jun 17, 2026

CVE-2021-41842 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An issue was discovered in AtaLegacySmm in the kernel 5.0 before 05.08.46, 5.1 before 05.16.46, 5.2 before 05.26.46, 5.3 before 05.35.46, 5.4 before 05.43.46, and 5.5 before 05.51.45 in Insyde InsydeH2O. Code execution can occur because the SMI handler lacks a CommBuffer check.. EPSS estimates a 1.53% chance of exploitation in the next 30 days.

Description

An issue was discovered in AtaLegacySmm in the kernel 5.0 before 05.08.46, 5.1 before 05.16.46, 5.2 before 05.26.46, 5.3 before 05.35.46, 5.4 before 05.43.46, and 5.5 before 05.51.45 in Insyde InsydeH2O. Code execution can occur because the SMI handler lacks a CommBuffer check.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.53%

71.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Insyde	Insydeh2o	>= 5.0, < 05.08.46
Insyde	Insydeh2o	>= 5.1, < 05.16.46
Insyde	Insydeh2o	>= 5.2, < 05.26.46
Insyde	Insydeh2o	>= 5.3, < 05.35.46
Insyde	Insydeh2o	> 5.4, < 05.43.46
Insyde	Insydeh2o	>= 5.5, < 05.51.45

References

https://security.netapp.com/advisory/ntap-20220223-0002/Third Party Advisory
https://www.insyde.com/security-pledgeVendor Advisory
https://security.netapp.com/advisory/ntap-20220223-0002/Third Party Advisory
https://www.insyde.com/security-pledgeVendor Advisory

Timeline

Published: Jan 6, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-41842?

How severe is CVE-2021-41842?

CVE-2021-41842 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.53% probability of exploitation in the next 30 days.

How do I fix CVE-2021-41842?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-41842?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST