CVE-2026-45923

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> net: usb: catc: enable basic endpoint checking<br /> <br /> catc_probe() fills three URBs with hardcoded endpoint pipes without<br /> verifying the endpoint descriptors:<br /> <br /> - usb_sndbulkpipe(usbdev, 1) and usb_rcvbulkpipe(usbdev, 1) for TX/RX<br /> - usb_rcvintpipe(usbdev, 2) for interrupt status<br /> <br /> A malformed USB device can present these endpoints with transfer types<br /> that differ from what the driver assumes.<br /> <br /> Add a catc_usb_ep enum for endpoint numbers, replacing magic constants<br /> throughout. Add usb_check_bulk_endpoints() and usb_check_int_endpoints()<br /> calls after usb_set_interface() to verify endpoint types before use,<br /> rejecting devices with mismatched descriptors at probe time.<br /> <br /> Similar to<br /> - commit 90b7f2961798 ("net: usb: rtl8150: enable basic endpoint checking")<br /> which fixed the issue in rtl8150.