CVE-2026-68366
Published: August 12, 2026Last modified: August 12, 2026
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.
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Vulnerable (6.1.177-r0) |
| 25 LTS | linux-lts | Vulnerable (6.12.95-r0) | |
| Stream | linux-lts | Fixed (6.18.43-r0) |
References
- https://git.kernel.org/stable/c/1f03658f3e9b2f8fd1d1003ba389a0390b49a350
- https://git.kernel.org/stable/c/4e116372b7a4f87df0dc0ed4b0ab5b0bb0cc5796
- https://git.kernel.org/stable/c/662f6c6c6ff8a6c508e1646c09cae74e28f3cca6
- https://git.kernel.org/stable/c/b70dc75e85ba968b7b76eebfe5d63000080b875b
- https://git.kernel.org/stable/c/c8510fbbea09ef0170b56b14dc2b5890dc75be07