high
8.2
CWE
787
Advisory Published
Updated

CVE-2021-42554

First published: Thu Feb 03 2022(Updated: )

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.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Insyde InsydeH2O>=5.0<5.08.42
Insyde InsydeH2O>=5.1<5.16.42
Insyde InsydeH2O>=5.2<5.26.42
Insyde InsydeH2O>=5.3<5.35.42
Insyde InsydeH2O>=5.4<5.42.51
Insyde InsydeH2O>=5.5<5.50.51
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Reference Links

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]

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