PT-2024-11955 · Smm+1 · Smm+1

Published 2024-08-13 · Updated 2025-08-13 · CVE-2023-20578

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions SMM (affected versions not specified)

Description A TOCTOU (Time-Of-Check-Time-Of-Use) issue 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.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Time Of Check To Time Of Use

Weakness Enumeration

CWE-367

Related Identifiers

BDU:2025-09860

CVE-2023-20578

Affected Products

Red Os

Smm

References · 13

• https://amd.com/en/resources/product-security/bulletin/amd-sb-3003.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-20578 · Security Note
• https://bdu.fstec.ru/vul/2025-09860 · Security Note
• https://osv.dev/vulnerability/CVE-2023-20578 · Vendor Advisory
• https://twitter.com/CVEnew/status/1823411952124829960 · Twitter Post
• https://twitter.com/PorsilapongoCl/status/1823413029830086841 · Twitter Post
• https://redos.red-soft.ru/support/secure/uyazvimosti/mnozhestvennye-uyazvimosti-linux-firmware-13082025/?sphrase_id=1203948 · Note
• https://t.me/cvedetector/3052 · Telegram Post
• https://twitter.com/cracbot/status/1825050104975462632 · Twitter Post
• https://t.me/cvenotify/96830 · Telegram Post
• https://twitter.com/VulmonFeeds/status/1823432646380183882 · Twitter Post
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti/mnozhestvennye-uyazvimosti-linux-firmware-13082025 · Note
• https://t.me/cvenotify/90449 · Telegram Post