CVE-2023-20548
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TOCTOU Race Condition in AMD Secure Processor Risks Memory Corruption

Publication date: 2026-02-11

Last updated on: 2026-03-05

Assigner: Advanced Micro Devices Inc.

Description
A Time-of-check time-of-use (TOCTOU) race condition in the AMD Secure Processor (ASP) could allow an attacker to corrupt memory resulting in loss of integrity, confidentiality, or availability.
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Meta Information
Published
2026-02-11
Last Modified
2026-03-05
Generated
2026-06-16
AI Q&A
2026-02-11
EPSS Evaluated
2026-06-15
NVD
CVE-2023-20548
EUVD
EUVD-2023-24727
Affected Vendors & Products
Showing 5 associated CPEs
Vendor Product Version / Range
amd rocm to 6.2.0 (exc)
amd radeon_software to 25.q2 (exc)
amd radeon_software to 24.6.1 (exc)
amd radeon_vii_firmware *
amd radeon_pro_vii_firmware *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-367 The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.
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Executive Summary

This vulnerability is a Time-of-check time-of-use (TOCTOU) race condition found in the AMD Secure Processor (ASP). It means that there is a timing issue where the system checks a condition and then uses the result of that check, but an attacker can exploit the time gap between these two actions to corrupt memory.

Such a race condition can allow an attacker to interfere with the normal operation of the processor, potentially leading to corrupted memory.

Impact Analysis

Exploitation of this vulnerability could result in loss of integrity, confidentiality, or availability of the system.

  • Loss of integrity means that data or system processes could be altered or corrupted.
  • Loss of confidentiality means sensitive information could be exposed to unauthorized parties.
  • Loss of availability means that system resources or services could be disrupted or made unavailable.
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