CVE-2023-20578

MediumCVSS 6.4/10Last modified Jun 17, 2026

Description

A TOCTOU (Time-Of-Check-Time-Of-Use) in SMM may allow an attacker with ring0 privileges and access to the BIOS menu or UEFI shell to modify the communications buffer potentially resulting in arbitrary code execution.

Metrics

CVSS 3.1 6.4/10CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-367

Affected software

No affected versions have been published.

Timeline

Published: Aug 13, 2024
Last modified: Jun 17, 2026
NVD status: Modified

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