CVE-2021-26383
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-06

Last updated on: 2025-09-08

Assigner: Advanced Micro Devices Inc.

Description
Insufficient bounds checking in AMD TEE (Trusted Execution Environment) could allow an attacker with a compromised userspace to invoke a command with malformed arguments leading to out of bounds memory access, potentially resulting in loss of integrity or availability.
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Meta Information
Published
2025-09-06
Last Modified
2025-09-08
Generated
2026-06-16
AI Q&A
2025-09-06
EPSS Evaluated
2026-06-15
NVD
CVE-2021-26383
EUVD
EUVD-2021-13189
Affected Vendors & Products
Showing 4 associated CPEs
Vendor Product Version / Range
amd athlon *
amd embedded_processor *
amd radeon_pro_w7000 *
amd ryzen *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.
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Executive Summary

CVE-2021-26383 is a high-severity vulnerability in AMD's Trusted Execution Environment (TEE) caused by insufficient bounds checking. An attacker who has already compromised userspace can invoke a command with malformed arguments, leading to out-of-bounds memory access. This can result in loss of system integrity or availability. [1, 2]

Impact Analysis

This vulnerability can impact you by causing loss of integrity and availability of the affected system. An attacker with local high privileges can exploit this flaw to cause out-of-bounds memory access, potentially disrupting system operations or compromising system integrity. [1, 2]

Mitigation Strategies

To mitigate CVE-2021-26383, you should update the Platform Initialization (PI) firmware to versions starting from EmbeddedPI-FP6 1.0.0.0 or later for affected AMD Ryzen Embedded V2000 Series processors. Additionally, update AMD software and drivers to the versions that include fixes for this vulnerability, such as ROCm 6.4, Radeon Software Adrenalin Edition 23.2.1, Radeon Software for Linux 25.10.1, and AMD Software PRO Edition 23.Q1, depending on your hardware. These updates address the insufficient bounds checking issue in the AMD Trusted Execution Environment (TEE) and help prevent out-of-bounds memory access that could lead to loss of integrity or availability. [1, 2]

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