← Vulnerability feed

Vulnerability record · CVE-2021-26386 · published 12 May 2022

CVE-2021-26386: Amd ryzen 3 2200u firmware out-of-bounds write vulnerability

AAmd · Ryzen 3 2200u Firmware

A malicious or compromised UApp or ABL may be used by an attacker to issue a malformed system call to the Stage 2 Bootloader potentially leading to corrupt memory and code execution.

7.8 CVSS 3.1 High EPSS 0.27% · top 82.8% CWE-787 · Out-of-bounds write
7.8CVSS 3.1 base score, v2 7.2
0.27%EPSS exploitation probability, 30 days
NoNot in CISA KEV
70Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

A malicious or compromised UApp or ABL may be used by an attacker to issue a malformed system call to the Stage 2 Bootloader potentially leading to corrupt memory and code execution.

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

Affected products

70 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-1027 Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1027 Vendor Advisory

Track CVE-2021-26386 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

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

9.8CVE-2022-23821Amd ryzen 9 3900 firmware vulnerabilityImproper access control in System Management Mode (SMM) may allow an attacker to write to SPI ROM potentially leading to arbitrary code execution.EPSS 0.99%9.8CVE-2022-23820Amd ryzen 9 3900 firmware improper input validation vulnerabilityFailure to validate the AMD SMM communication buffer may allow an attacker to corrupt the SMRAM potentially leading to arbitrary code execution.EPSS 0.70%8.8CVE-2023-20558Amd ryzen 7 5700g firmware vulnerabilityInsufficient control flow management in AmdCpmOemSmm may allow a privileged attacker to tamper with the SMM handler potentially leading to an escalat…EPSS 0.67%8.8CVE-2023-20559Amd ryzen 7 5700g firmware vulnerabilityInsufficient control flow management in AmdCpmGpioInitSmm may allow a privileged attacker to tamper with the SMM handler potentially leading to escal…EPSS 0.67%8.2CVE-2021-26365Amd ryzen 5 2400g firmware out-of-bounds read vulnerabilityCertain size values in firmware binary headers could trigger out of bounds reads during signature validation, leading to denial of service or potenti…EPSS 0.57%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%7.8CVE-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%

Source: NIST National Vulnerability Database (record CVE-2021-26386), CISA KEV, FIRST EPSS (scores of 2026-10-01). This page is refreshed as NVD updates the record.