CVE-2020-5953

Published Feb 3, 2022 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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).

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
EUVD EUVD EUVD-2020-27107 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).
History
Type Values Removed Values Added
Metrics epss

{'score': 0.00185}

epss

{'score': 0.0021}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Aug 11, 2026, 12:22 PM
Reserved
Jan 6, 2020, 12:00 AM
Status
Modified
Published
Feb 3, 2022, 1:15 AM
Modified
Aug 11, 2026, 1:17 PM