Feb. 15, 2023, 2:15 p.m. |

National Vulnerability Database web.nvd.nist.gov

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. DMA attacks on the VariableRuntimeDxe 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 issue was fixed in the kernel, which also protected chipset and OEM chipset code.

attacks buffer chipset code corruption cve dma escalation insyde issue kernel non oem privileges toctou

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