High severity7.0NVD Advisory· Published Feb 15, 2023· Updated Jun 17, 2026
CVE-2022-32955
CVE-2022-32955
Description
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.
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Affected products
3- Insyde/InsydeH2Odescription
Patches
Vulnerability mechanics
References
2- www.insyde.com/security-pledgenvdVendor Advisory
- www.insyde.com/security-pledge/SA-2023015nvdVendor Advisory
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