CVE-2026-68370

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

Description An issue exists in the dummy hcd component of the USB gadget subsystem where a shared usb request (dum->fifo req) can be reused prematurely during the giveback process. The dummy queue() function uses a fast-path for small IN transfers that considers the slot free if list empty(&fifo req.queue) is true. However, the completion process unlinks the request using list del init() before the completion callback req->complete() returns. This allows a concurrent dummy queue() execution on another CPU to reuse the fifo req and overwrite req->complete while it is still being executed. This leads to an indirect call to a clobbered pointer, resulting in a general protection fault or page fault in dummy timer().

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.