VYPR
High severity7.5NVD Advisory· Published Feb 3, 2022· Updated Aug 11, 2026

CVE-2020-5953

CVE-2020-5953

Description

A vulnerability exists in System Management Interrupt (SWSMI) handler of InsydeH2O UEFI Firmware code located in SWSMI handler that dereferences gRT (EFI_RUNTIME_SERVICES) pointer to call a GetVariable service, which is located outside of SMRAM. This can result in code execution in SMM (escalating privilege from ring 0 to ring -2).

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Affected products

24

Patches

Vulnerability mechanics

References

6

News mentions

0

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