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Vulnerability record · CVE-2021-46754 · published 9 May 2023

CVE-2021-46754: Amd ryzen 5300g firmware improper input validation vulnerability

AAmd · Ryzen 5300g Firmware

Insufficient input validation in the ASP (AMD Secure Processor) bootloader may allow an attacker with a compromised Uapp or ABL to coerce the bootloader into exposing sensitive information to the SMU (System Management Unit) resulting in a potential loss of confidentiality and integrity.

9.1 CVSS 3.1 Critical EPSS 0.57% · top 55.3% CWE-20 · Improper input validation
9.1CVSS 3.1 base score
0.57%EPSS exploitation probability, 30 days
NoNot in CISA KEV
56Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

Insufficient input validation in the ASP (AMD Secure Processor) bootloader may allow an attacker with a compromised Uapp or ABL to coerce the bootloader into exposing sensitive information to the SMU (System Management Unit) resulting in a potential loss of confidentiality and integrity.

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

Affected products

56 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-4001 Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-5001
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001 Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-5001

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Related vulnerabilities

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

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%8.8CVE-2021-46773Amd ryzen 6600h firmware improper input validation vulnerabilityInsufficient input validation in ABL may enable a privileged attacker to corrupt ASP memory, potentially resulting in a loss of integrity or code exe…EPSS 0.77%8.2CVE-2022-23815Amd athlon silver 3050u firmware out-of-bounds write vulnerabilityImproper bounds checking in APCB firmware may allow an attacker to perform an out of bounds write, corrupting the APCB entry, potentially leading to …EPSS 0.16%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-2021-26316Amd epyc 7h12 firmware improper input validation vulnerabilityFailure to validate the communication buffer and communication service in the BIOS may allow an attacker to tamper with the buffer resulting in poten…EPSS 0.26%7.5CVE-2021-46794Amd ryzen 5300g firmware out-of-bounds read vulnerabilityInsufficient bounds checking in ASP (AMD Secure Processor) may allow for an out of bounds read in SMI (System Management Interface) mailbox checksum …EPSS 0.62%7.5CVE-2021-46749Amd ryzen 5300g firmware out-of-bounds read vulnerabilityInsufficient bounds checking in ASP (AMD Secure Processor) may allow for an out of bounds read in SMI (System Management Interface) mailbox checksum …EPSS 0.62%6.8CVE-2023-20589Amd ryzen 5 pro 3400g firmware vulnerabilityAn attacker with specialized hardware and physical access to an impacted device may be able to perform a voltage fault injection attack resulting in …EPSS 0.58%

Source: NIST National Vulnerability Database (record CVE-2021-46754), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.