Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: uvc: clamp SEND_RESPONSE length to the response buffer uvc_send_response() builds the UVC control response from a user-supplied struct uvc_request_data: req->length = min_t(unsigned int, uvc->event_length, data->length); ... memcpy(req->buf, data->data, req->length); req->length is clamped to uvc->event_length, which is taken from the host control request wLength (up to UVC_MAX_REQUEST_SIZE, 64), and to data->length, which comes from the UVCIOC_SEND_RESPONSE ioctl and is only checked for being negative. The source buffer data->data is only 60 bytes, so a response with uvc->event_length and data->length both greater than 60 makes memcpy() read past the end of data->data. Clamp req->length to sizeof(data->data) as well.
References
- https://git.kernel.org/stable/c/1f03658f3e9b2f8fd1d1003ba389a0390b49a350
- https://git.kernel.org/stable/c/4e116372b7a4f87df0dc0ed4b0ab5b0bb0cc5796
- https://git.kernel.org/stable/c/568e68d8f80395a64848aa2946af8ade72da0ffb
- https://git.kernel.org/stable/c/662f6c6c6ff8a6c508e1646c09cae74e28f3cca6
- https://git.kernel.org/stable/c/82ec2c1e456b17451f0736c3983402642f961733
- https://git.kernel.org/stable/c/b70dc75e85ba968b7b76eebfe5d63000080b875b
- https://git.kernel.org/stable/c/c8510fbbea09ef0170b56b14dc2b5890dc75be07
- https://git.kernel.org/stable/c/eaf783c005299a702f2cc96b08cd21ede081f098
FAQ
What is CVE-2026-68366?
CVE-2026-68366 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: usb: gadget: uvc: clamp SEND_RESPONSE length to the response buffer uvc_send_response() builds the UVC control response from a use...
How severe is CVE-2026-68366?
CVSS scoring is not yet available for CVE-2026-68366. Check NVD for updates.
Is there a patch for CVE-2026-68366?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.