What is CVE-2022-32476?

CVE-2022-32476 is an issue discovered in Insyde InsydeH2O with kernel 5.0 through 5.5 that allows DMA attacks on the AhciBusDxe shared buffer, leading to potential corruption of SMRAM and escalation of privileges.

How does CVE-2022-32476 impact the system?

CVE-2022-32476 can lead to TOCTOU race-condition issues and corruption of SMRAM, which could result in the escalation of privileges by an attacker.

Which versions of Insyde InsydeH2O are affected by CVE-2022-32476?

Insyde InsydeH2O versions 5.0 through 5.5 are affected by CVE-2022-32476.

How can CVE-2022-32476 be mitigated?

CVE-2022-32476 can be mitigated using IOMMU protection.

Where can I find more information about CVE-2022-32476?

More information about CVE-2022-32476 can be found at the following links: [Link 1](https://www.insyde.com/security-pledge), [Link 2](https://www.insyde.com/security-pledge/SA-2023008)

Vulnerability/
CVE-2022-32476

high

CWE

367

15/2/2023

3/8/2024

CVE-2022-32476

First published: Wed Feb 15 2023(Updated: )

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. DMA attacks on the AhciBusDxe shared buffer used by SMM and non-SMM code could cause TOCTOU race-condition issues that could lead to corruption of SMRAM and escalation of privileges. This attack can be mitigated using IOMMU protection for the ACPI runtime memory used for the command buffer. This attack can be mitigated by copying the firmware block services data to SMRAM before checking it.

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
Insyde InsydeH2O	>=5.0<5.2.05.27.27
Insyde InsydeH2O	>=5.3<5.3.05.36.27
Insyde InsydeH2O	>=5.4<5.4.05.44.27
Insyde InsydeH2O	>=5.5<5.5.05.52.27

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Frequently Asked Questions

What is CVE-2022-32476?
CVE-2022-32476 is an issue discovered in Insyde InsydeH2O with kernel 5.0 through 5.5 that allows DMA attacks on the AhciBusDxe shared buffer, leading to potential corruption of SMRAM and escalation of privileges.
How does CVE-2022-32476 impact the system?
CVE-2022-32476 can lead to TOCTOU race-condition issues and corruption of SMRAM, which could result in the escalation of privileges by an attacker.
Which versions of Insyde InsydeH2O are affected by CVE-2022-32476?
Insyde InsydeH2O versions 5.0 through 5.5 are affected by CVE-2022-32476.
How can CVE-2022-32476 be mitigated?
CVE-2022-32476 can be mitigated using IOMMU protection.
Where can I find more information about CVE-2022-32476?
More information about CVE-2022-32476 can be found at the following links: [Link 1](https://www.insyde.com/security-pledge), [Link 2](https://www.insyde.com/security-pledge/SA-2023008)

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vendor/insyde
canonical/insyde insydeh2o
version/insyde insydeh2o/5.0
version/insyde insydeh2o/5.3
version/insyde insydeh2o/5.4
version/insyde insydeh2o/5.5

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