CVE-2026-43156

In the Linux kernel, the following vulnerability has been resolved:

net: usb: pegasus: enable basic endpoint checking

pegasus_probe() fills URBs with hardcoded endpoint pipes without
verifying the endpoint descriptors:

– usb_rcvbulkpipe(dev, 1) for RX data
– usb_sndbulkpipe(dev, 2) for TX data
– usb_rcvintpipe(dev, 3) for status interrupts

A malformed USB device can present these endpoints with transfer types
that differ from what the driver assumes.

Add a pegasus_usb_ep enum for endpoint numbers, replacing magic
constants throughout. Add usb_check_bulk_endpoints() and
usb_check_int_endpoints() calls before any resource allocation to
verify endpoint types before use, rejecting devices with mismatched
descriptors at probe time, and avoid triggering assertion.

Similar fix to
– commit 90b7f2961798 (“net: usb: rtl8150: enable basic endpoint checking”)
– commit 9e7021d2aeae (“net: usb: catc: enable basic endpoint checking”)

More information : https://git.kernel.org/stable/c/229dc9b9db475ac900182bafe258943e0e054c6d