CVE-2021-45970
First published: Wed Jan 05 2022(Updated: )
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).
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Insyde H2O | >=5.1<5.16.25 | |
| Insyde H2O | >=5.2<5.26.25 | |
| Insyde H2O | >=5.3<5.35.25 | |
| Insyde H2O | >=5.4<5.43.25 | |
| Insyde H2O | >=5.5<05.51.25 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-45970?
CVE-2021-45970 is considered a high-severity vulnerability due to its impact on system management mode.
How do I fix CVE-2021-45970?
To fix CVE-2021-45970, you should update the InsydeH2O UEFI BIOS to a version later than the specified vulnerable versions.
Which versions of InsydeH2O are affected by CVE-2021-45970?
CVE-2021-45970 affects InsydeH2O versions prior to 5.16.25, 5.26.25, 5.35.25, 5.43.25, and 5.51.25.
What components are impacted by CVE-2021-45970?
CVE-2021-45970 impacts the ideBusDxe component within the InsydeH2O UEFI BIOS.
What does SMM mean in the context of CVE-2021-45970?
In the context of CVE-2021-45970, SMM stands for System Management Mode, which is a special operating mode for handling system management tasks.
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