CVE-2021-26356

State: Published
Severity: 7.4 High
Published: May 9, 2023
Updated: Jan 28, 2025
Reserved: Jan 29, 2021

Description

A TOCTOU in ASP bootloader may allow an attacker to tamper with the SPI ROM following data read to memory potentially resulting in S3 data corruption and information disclosure.

Scores

CVSS	Score	Vector	Source
3.1	7.4 High	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N	CISA-ADP

Weaknesses

CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition

Affected Products

Product	Versions
Ryzen™ 3000 Series Desktop Processors “Matisse” AM4AMD	various Affected
AMD Ryzen™ 5000 Series Desktop Processors “Vermeer” AM4AMD	various Affected
3rd Gen AMD Ryzen™ Threadripper™ Processors “Castle Peak” HEDTAMD	variousAffected
Ryzen™ Threadripper™ PRO Processors “Castle Peak” WSAMD	various Affected
Ryzen™ Threadripper™ PRO Processors “Chagall” WSAMD	various Affected
1st Gen AMD EPYC™ ProcessorsAMD	various Affected
2nd Gen AMD EPYC™ ProcessorsAMD	various Affected
3rd Gen AMD EPYC™ ProcessorsAMD	various Affected

References

https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001vendor-advisory
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001vendor-advisory

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