UNKNOWN NVD
CVE-2026-89733
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: uvc: fix dangling pointers in uvc_function_bind() and uvc_function_unbind() I
In the Linux kernel, the following vulnerability has been resolved:
usb: gadget: uvc: fix dangling pointers in uvc_function_bind() and uvc_function_unbind()
In uvc_function_bind() error path, we use usb_ep_free_request which
uses uvc->control_req but does not set it to NULL afterwards. Thus,
uvc->control_req is a dangling pointer causing a UAF. Also we do not set
the uvc->control_buf pointer to NULL after freeing it, which is another
dangling pointer. Fix it by setting uvc->control_req to NULL after we run
usb_ep_free_request() and uvc->control_buf to NULL after kfree. Do the
same for uvc_function_unbind().
References
- https://git.kernel.org/stable/c/38f822ddce9355893d734279a26ddec45182197e
- https://git.kernel.org/stable/c/8e88ed8a374de67270d38689f2a81018909cafbb
- https://git.kernel.org/stable/c/9897b7da8c0ad8356c1b8649379fcb5a689462cb
- https://git.kernel.org/stable/c/bdab5605259ba5d6ff927c1a85cc83eb3ecfdacc
This unknown severity vulnerability was published on 2026-09-11 via NVD.
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