Live › vulnerability › CVE-2026-98757
Go to dashboardThe Cadence USB3 gadget driver in the Linux kernel can free its device structures while deferred work items still reference them, because the exit path does not wait for those work items to finish. A local or hardware-triggered race on driver teardown can lead to a use-after-free in kernel memory.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 21:57 UTC. All times on this page are UTC.
Systems running a Linux kernel with the Cadence USB3 (cdns3) gadget driver, typically embedded boards or devices acting as USB peripherals. The flaw is in driver teardown, so systems without this driver, or hosts that never unbind it, are unlikely to be exposed. The sources do not state the exact kernel versions affected.
No product ranges from the sources yet.
uname -r and the distribution's changelog for 'cdns3_gadget_exit'.lsmod | grep cdns3 or lsmod | grep cdns3_; if absent, the system is not exposed through this driver.Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
In the Linux kernel, the following vulnerability has been resolved:
usb: cdns3: fix use-after-free in cdns3_gadget_exit()
cdns3_gadget_start() arms two works on system_freezable_wq: pending_status_wq for the deferred ep0 status stage and aligned_buf_wq for realigned request buffers. Both handlers use the cdns3_device the works are embedded in, and cdns3_pending_setup_status_handler() also calls the ep0 request completion.
cdns3_gadget_exit() does not wait for these works. It frees all endpoints and aligned buffers and drops the last reference to the gadget device, which frees priv_dev, so a work queued before the exit can run after the free.
Fix this by waiting for both works after the gadget driver is unbound and the IRQ is freed, when no new work can be queued, and before the endpoints and buffers are released.
This issue was found by an in-house static analysis tool.
This page as .md · .json · in your agent: get_signal("CVE-2026-98757")
NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.