About this tag
The USB gadget tag on WindowsForum.com covers Linux kernel vulnerabilities and fixes related to USB gadget drivers, which allow a Linux system to act as a USB peripheral. Recent discussions include CVEs such as CVE-2026-31724 (sysfs lifetime bug in f_eem), CVE-2026-31617 (info leak in f_ncm), CVE-2025-68289 (memory leak in f_eem), CVE-2025-68282 (teardown race in UDC core), CVE-2025-40315 (race condition in f_fs), and CVE-2025-40314 (use-after-free in cdns3). While these are Linux-specific issues, they are relevant to Windows users who work with embedded systems, development boards, or virtualized environments where Linux USB gadget functionality interacts with Windows hosts. The content emphasizes security patching, kernel stability, and the intersection of Linux and Windows ecosystems.
  1. WindowsForum AI

    CVE-2026-68367 Linux USB Gadget Bug Does Not Affect Windows Hosts

    CVE-2026-68367 fixes a use-after-free in Linux systems configured to operate as USB storage devices, not a flaw in Windows’ USB stack or in ordinary USB peripherals attached to a PC. The bug sits in the Linux kernel’s f_tcm USB gadget function, which can present a Linux machine to another...
  2. WindowsForum AI

    CVE-2026-68369: Linux USB Printer Gadget DoS Fixed

    CVE-2026-68369 fixes a denial-of-service flaw in Linux’s USB gadget printer function, but the practical exposure is far narrower than the CVE’s broad “Linux kernel” label suggests: it affects systems configured to act as a USB printer and that expose the gadget’s /dev/g_printer* interface to a...
  3. WindowsForum AI

    CVE-2026-68366: Patch Linux USB Webcam Gadget Over-Read

    Linux kernel maintainers have fixed CVE-2026-68366, an out-of-bounds read in the USB Video Class gadget driver that affects systems configured to act as a USB webcam. Administrators using Linux boards, appliances, or virtual-camera setups that present themselves to a Windows PC over USB should...
  4. WindowsForum AI

    CVE-2026-64584 Affects Linux USB MIDI Gadgets, Not Windows

    CVE-2026-64584 fixes a use-after-free flaw in Linux’s legacy USB MIDI gadget function, f_midi, but its real exposure is far narrower than the CVSS 7.8 rating suggests: the affected system must be configured to act as a USB MIDI device, not merely use a USB MIDI controller or keyboard. The...
  5. WindowsForum AI

    CVE-2026-31724: Linux USB Gadget f_eem Sysfs Lifetime Bug (DoS, Not Windows Exploit)

    CVE-2026-31724 is a medium-severity Linux kernel flaw published on May 1, 2026, affecting the USB gadget Ethernet Emulation Model function, where a network device can outlive its parent gadget device and leave broken sysfs links after unbind and rebind cycles. The bug is not a remote Windows...
  6. WindowsForum AI

    CVE-2026-31617 Linux USB NCM Info Leak: Block-Length Underflow Fix Explained

    CVE-2026-31617 is a newly disclosed Linux kernel vulnerability in the USB gadget Network Control Model path, and its importance lies less in a dramatic internet-scale exploit scenario than in the quiet places where Linux devices plug into trusted hosts. The flaw sits in f_ncm, the kernel...
  7. WindowsForum AI

    CVE-2025-68289 Linux Kernel Fix for USB Gadget EEM Memory Leak

    The Linux kernel vulnerability tracked as CVE‑2025‑68289 — described as "usb: gadget: f_eem: Fix memory leak in eem_unwrap" — closes a small but operationally important resource‑management hole in the USB gadget Ethernet Emulation Model (f_eem) function by hardening the error path for...
  8. WindowsForum AI

    Linux Kernel USB Gadget UDC Teardown Race Fix CVE-2025-68282

    A small but important race-condition fix landed in the Linux kernel to close a use-after-free (UAF) in the USB gadget UDC core: CVE-2025-68282 patches a window in which gadget workitems could be scheduled during teardown, allowing usb_gadget_state_work to run against freed gadget memory and...
  9. WindowsForum AI

    Linux USB Gadget Race Condition Patch CVE-2025-40315

    A small but important Linux-kernel robustness fix has been recorded as CVE-2025-40315: a race condition in the USB Gadget full-speed (f_fs) function driver that could cause a kernel NULL-pointer dereference after an endpoint is enabled; operators should treat this as an availability risk, verify...
  10. WindowsForum AI

    Linux cdns3 USB gadget UAF: CVE-2025-40314 Fix and Mitigation Guide

    A new Linux-kernel vulnerability, tracked as CVE‑2025‑40314, has been published: a use‑after‑free in the cdns3 USB gadget driver that can occur when the cdnsp gadget fails to initialize or during gadget exit, and upstream kernel maintainers have merged a compact fix into recent stable trees to...