Jul 2025: Microsoft Windows QoS Scheduler Driver Elevation of Privilege Vulnerability
CVE-2025-49730 Published on July 8, 2025
Microsoft Windows QoS Scheduler Driver Elevation of Privilege Vulnerability
Time-of-check time-of-use (toctou) race condition in Microsoft Windows QoS scheduler allows an authorized attacker to elevate privileges locally.
Weakness Types
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-2025-49730 has been classified to as a TOCTTOU vulnerability or weakness.
Heap-based Buffer Overflow
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
Products Associated with CVE-2025-49730
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Affected Versions
Microsoft Windows 10 Version 1507:- Version 10.0.10240.0 and below 10.0.10240.21073 is affected.
- Version 10.0.14393.0 and below 10.0.14393.8246 is affected.
- Version 10.0.17763.0 and below 10.0.17763.7558 is affected.
- Version 10.0.19044.0 and below 10.0.19044.6093 is affected.
- Version 10.0.19045.0 and below 10.0.19045.6093 is affected.
- Version 10.0.22621.0 and below 10.0.22621.5624 is affected.
- Version 10.0.22631.0 and below 10.0.22631.5624 is affected.
- Version 10.0.22631.0 and below 10.0.22631.5624 is affected.
- Version 10.0.26100.0 and below 10.0.26100.4652 is affected.
- Version 6.1.7601.0 and below 6.1.7601.27820 is affected.
- Version 6.1.7601.0 and below 6.1.7601.27820 is affected.
- Version 6.0.6003.0 and below 6.0.6003.23418 is affected.
- Version 6.0.6003.0 and below 6.0.6003.23418 is affected.
- Version 6.2.9200.0 and below 6.2.9200.25573 is affected.
- Version 6.2.9200.0 and below 6.2.9200.25573 is affected.
- Version 6.3.9600.0 and below 6.3.9600.22676 is affected.
- Version 6.3.9600.0 and below 6.3.9600.22676 is affected.
- Version 10.0.14393.0 and below 10.0.14393.8246 is affected.
- Version 10.0.14393.0 and below 10.0.14393.8246 is affected.
- Version 10.0.17763.0 and below 10.0.17763.7558 is affected.
- Version 10.0.17763.0 and below 10.0.17763.7558 is affected.
- Version 10.0.20348.0 and below 10.0.20348.3932 is affected.
- Version 10.0.25398.0 and below 10.0.25398.1732 is affected.
- Version 10.0.26100.0 and below 10.0.26100.4652 is affected.
- Version 10.0.26100.0 and below 10.0.26100.4652 is affected.
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.