CVE-2026-74551

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description Memory corruption occurs on non-coherent CPU architectures, such as ARM or MIPS, due to cacheline sharing. The issue arises when the send output report() function calls hid hw output report(), leading the USB HID core to execute usb interrupt msg(), which maps the output buffer directly for Direct Memory Access (DMA). When the DMA mapping flushes or invalidates the cacheline, it corrupts adjacent variables, specifically mutex and update interval, which are modified concurrently by the CPU. This corruption is triggered by any operation that invokes send output report(), such as updating the interval or setting fan speed.

Recommendations Align the output buffer to ARCH DMA MINALIGN to resolve the memory corruption issue.