CVE-2021-45969
First published: Wed Jan 05 2022(Updated: )
An issue was discovered in AhciBusDxe 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 CommBuffer+8 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-2021-45969?
CVE-2021-45969 is classified with a high severity due to its potential impact on SMM (System Management Mode) operations.
How do I fix CVE-2021-45969?
To mitigate CVE-2021-45969, update the InsydeH2O BIOS to versions 5.16.25, 5.26.25, 5.35.25, 5.43.25, or 5.51.25 or later.
What are the affected versions by CVE-2021-45969?
CVE-2021-45969 affects InsydeH2O BIOS versions prior to 5.16.25, 5.26.25, 5.35.25, 5.43.25, and 5.51.25.
What type of vulnerability is CVE-2021-45969?
CVE-2021-45969 is a vulnerability within the SMM branch of the InsydeH2O BIOS.
Who is affected by CVE-2021-45969?
Users of InsydeH2O UEFI BIOS versions listed prior to the secure updates are vulnerable to CVE-2021-45969.
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