CVE-2026-64327

CVE-2026-64327 affects the Linux kernel USB gadget f_fs (FunctionFS) component. The root cause is that epfile->in was only initialized in ffs_func_eps_enable() (triggered on USB host connection), so early userspace ioctls such as FUNCTIONFS_DMABUF_ATTACH executed before host connection would o...

CVE-2026-63894

Summary (CVE-2026-63894): A race in Linux kernel’s FunctionFS DMABUF handling allows a freed usb_request to be dequeued via an obsolete priv->req pointer when cancelling a DMABUF attachment. The root cause is that ffs_epfile_dmabuf_io_complete() frees the request but leaves priv->req pointi...

EUVD-2025-201630

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: ffs: Fix epfile null pointer access after ep enable. A race condition occurs when ffsfuncepsenable runs concurrently with ffsdatareset. The ffsdataclear called in ffsdatareset sets ffs-epfiles to NULL before resettin...