CVE-2021-45970

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).

Category

8.2
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.05%
Vendor Advisory insyde.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.insyde.com/security-pledge vendor advisory
https://security.netapp.com/advisory/ntap-20220216-0004/ third party advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-45970?
CVE-2021-45970 has been scored as a high severity vulnerability.
How to fix CVE-2021-45970?
To fix CVE-2021-45970, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-45970 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-45970 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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