VULNERABILITY INTELLIGENCE

CVE-2023-20578

CVSS score7.5 HIGH
EPSS probability0.12%
CISA KEVNot currently listed
Published2024-08-13
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

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.

Weakness classification

  • nvd@nist.gov: CWE-367
  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-367

Primary references