CVE-2022-32955
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 NvmExpressDxe 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 by using IOMMU protection for the ACPI runtime memory used for the command buffer. This attack can be mitigated by copying the link data to SMRAM before checking it and verifying that all pointers are within the buffer.
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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Reference Links
Frequently Asked Questions
What is CVE-2022-32955?
CVE-2022-32955 is an issue discovered in Insyde InsydeH2O with kernel 5.0 through 5.5 that could lead to corruption of SMRAM and escalation of privileges.
How does CVE-2022-32955 affect Insyde InsydeH2O?
CVE-2022-32955 affects Insyde InsydeH2O with kernel 5.0 through 5.5 by allowing DMA attacks on the NvmExpressDxe buffer used by SMM and non-SMM code.
How can CVE-2022-32955 be mitigated?
CVE-2022-32955 can be mitigated by using IOMMU protection.
What is the severity of CVE-2022-32955?
CVE-2022-32955 has a severity level of high (7) due to the potential for corruption of SMRAM and privilege escalation.
How can I fix CVE-2022-32955?
To fix CVE-2022-32955, update to a version of Insyde InsydeH2O with kernel 5.6 or higher, once it becomes available.
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