CVE-2021-42554: High severity Insyde InsydeH2O vulnerability
An issue was discovered in Insyde InsydeH2O with Kernel 5.0 before 05.08.42, Kernel 5.1 before 05.16.42, Kernel 5.2 before 05.26.42, Kernel 5.3 before 05.35.42, Kernel 5.4 before 05.42.51, and Kernel 5.5 before 05.50.51. An SMM memory corruption vulnerability in FvbServicesRuntimeDxe allows a possible attacker to write fixed or predictable data to SMRAM. Exploiting this issue could lead to escalating privileges to SMM.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Insyde InsydeH2O Kernelto a version that resolves this vulnerability.Fixed in 05.08.42 - Upgrade
Upgrade
Insyde InsydeH2O Kernelto a version that resolves this vulnerability.Fixed in 05.16.42 - Upgrade
Upgrade
Insyde InsydeH2O Kernelto a version that resolves this vulnerability.Fixed in 05.26.42 - Upgrade
Upgrade
Insyde InsydeH2O Kernelto a version that resolves this vulnerability.Fixed in 05.35.42 - Upgrade
Upgrade
Insyde InsydeH2O Kernelto a version that resolves this vulnerability.Fixed in 05.42.51 - Upgrade
Upgrade
Insyde InsydeH2O Kernelto a version that resolves this vulnerability.Fixed in 05.50.51
Event History
Frequently Asked Questions
What is CVE-2021-42554?
CVE-2021-42554 is a vulnerability discovered in Insyde InsydeH2O with Kernel 5.0 before 05.08.42, Kernel 5.1 before 05.16.42, Kernel 5.2 before 05.26.42, Kernel 5.3 before 05.35.42, Kernel 5.4 before 05.42.51, and Kernel 5.5 before 05.50.51. It is an SMM memory corruption vulnerability in FvbServicesRuntimeDxe.
How severe is CVE-2021-42554?
CVE-2021-42554 has a severity rating of 8.2, which is considered high.
What software is affected by CVE-2021-42554?
Insyde InsydeH2O versions 5.0 to 5.5 are affected by CVE-2021-42554.
How can I fix CVE-2021-42554?
To fix CVE-2021-42554, it is recommended to update Insyde InsydeH2O to a version above 05.50.51, if available.
Where can I find more information about CVE-2021-42554?
You can find more information about CVE-2021-42554 in the following references: [1] [2] [3]