TOCTOU Race in SMM Communications Buffer Allowing Privileged Out-of-Bounds Access
CVE-2024-36311 Published on February 10, 2026
A Time-of-check time-of-use (TOCTOU) race condition in the SMM communications buffer could allow a privileged attacker to bypass input validation and perform an out of bounds read or write, potentially resulting in loss of confidentiality, integrity, or availability.
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-2024-36311 has been classified to as a TOCTTOU vulnerability or weakness.
Affected Versions
AMD Ryzen™ 7045 Series Mobile Processors with Radeon™ Graphics:- Version DragonRangeFL1PI 1.0.0.3h is unaffected.
- Version ComboAM5PI 1.0.0.b is unaffected.
- Version ComboAM5PI 1.1.0.3d is unaffected.
- Version ComboAM5PI 1.2.0.3d is unaffected.
- Version FireRangeFL1PI 1.0.0.0a is unaffected.
- Version ComboAM5PI 1.1.0.3d is unaffected.
- Version ComboAM5PI 1.2.0.3d is unaffected.
- Version ComboAM5PI 1.2.0.3d is unaffected.
- Version EmbeddedAM5PI 1.0.0.4 is unaffected.
Exploit Probability
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.