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Vulnerability record · CVE-2021-26316 · published 11 January 2023

CVE-2021-26316: Amd epyc 7h12 firmware improper input validation vulnerability

AAmd · Epyc 7h12 Firmware

Failure to validate the communication buffer and communication service in the BIOS may allow an attacker to tamper with the buffer resulting in potential SMM (System Management Mode) arbitrary code execution.

7.8 CVSS 3.1 High EPSS 0.26% · top 84.5% CWE-20 · Improper input validation
7.8CVSS 3.1 base score
0.26%EPSS exploitation probability, 30 days
NoNot in CISA KEV
147Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

Failure to validate the communication buffer and communication service in the BIOS may allow an attacker to tamper with the buffer resulting in potential SMM (System Management Mode) arbitrary code execution.

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

Affected products

147 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1031 Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032 Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1031 Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.1CVE-2021-46754Amd ryzen 5300g firmware improper input validation vulnerabilityInsufficient input validation in the ASP (AMD Secure Processor) bootloader may allow an attacker with a compromised Uapp or ABL to coerce the bootloa…EPSS 0.57%9.1CVE-2021-46753Amd ryzen 6600h firmware vulnerabilityFailure to validate the length fields of the ASP (AMD Secure Processor) sensor fusion hub headers may allow an attacker with a malicious Uapp or ABL …EPSS 0.56%7.8CVE-2023-20555Amd ryzen 3 3300 firmware out-of-bounds write vulnerabilityInsufficient input validation in CpmDisplayFeatureSmm may allow an attacker to corrupt SMM memory by overwriting an arbitrary bit in an attacker-cont…EPSS 0.32%7.8CVE-2021-26392Amd enterprise driver out-of-bounds write vulnerabilityInsufficient verification of missing size check in 'LoadModule' may lead to an out-of-bounds write potentially allowing an attacker with privileges t…EPSS 0.27%7.8CVE-2020-12931Amd enterprise driver vulnerabilityImproper parameters handling in the AMD Secure Processor (ASP) kernel may allow a privileged attacker to elevate their privileges potentially leading…EPSS 0.26%7.8CVE-2020-12930Amd enterprise driver vulnerabilityImproper parameters handling in AMD Secure Processor (ASP) drivers may allow a privileged attacker to elevate their privileges potentially leading to…EPSS 0.26%7.8CVE-2021-26317Amd radeon software vulnerabilityFailure to verify the protocol in SMM may allow an attacker to control the protocol and modify SPI flash resulting in a potential arbitrary code exec…EPSS 0.27%7.8CVE-2021-26369Amd radeon software memory buffer overflow vulnerabilityA malicious or compromised UApp or ABL may be used by an attacker to send a malformed system call to the bootloader, resulting in out-of-bounds memor…EPSS 0.23%

Source: NIST National Vulnerability Database (record CVE-2021-26316), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.