CVE-2021-26316
hw: amd: arbitrary code execution in bios due to a fault in communication buffer
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Severity
ImportantRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · January 10, 2023
Updated · November 21, 2025
Description
A flaw was found in hw. Failure to validate the BIOS's communication buffer and communication service may allow an attacker to tamper with the buffer, resulting in potential System Management Mode (SMM) arbitrary code execution.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Please contact AMD for more updates on this flaw.
CVSS / CWE
CVSS 3.1 · 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE not specified