AMD Secure Processor TOCTOU Memory Corruption (CVE-2023-20548)
CVE-2023-20548 Published on February 11, 2026

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.

NVD

Weakness Type

What is a TOCTTOU Vulnerability?

The software 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. This can cause the software to perform invalid actions when the resource is in an unexpected state. This weakness can be security-relevant when an attacker can influence the state of the resource between check and use. This can happen with shared resources such as files, memory, or even variables in multithreaded programs.

CVE-2023-20548 has been classified to as a TOCTTOU vulnerability or weakness.


Affected Versions

AMD Radeon™ RX 5000 Series Graphics Products: AMD Radeon™ PRO W5000 Series Graphics Products: AMD Radeon™ VII: AMD Radeon™ PRO VII: AMD Instinct™ MI210: AMD Instinct™ MI250: AMD Instinct™ MI300X: AMD Instinct™ MI300A:

Exploit Probability

EPSS
0.01%
Percentile
0.62%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.