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Heap-based buffer overflow in Kernel Streaming
Technical deep-dive into CVE-2025-53149, a heap-based buffer overflow in the Windows Kernel Streaming WOW Thunk Service driver (ksthunk.sys).
One such case is CVE-2025-53149, a heap-based buffer overflow in the Kernel Streaming WOW Thunk Service Driver, which Microsoft patched on August 12, 2025. It provides a low-latency, high-performance architecture that allows devices and applications to efficiently process and transport large volumes of data, such as audio and video. KSThunk, short for “Kernel Streaming WOW Thunk Service,” is a specific component within the Windows operating system that plays a crucial role in maintaining backwards compatibility for multimedia applications.
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