CVE-2026-43156

Description

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")

References

• https://git.kernel.org/stable/c/229dc9b9db475ac900182bafe258943e0e054c6d
• https://git.kernel.org/stable/c/26b3ec62fa1a94ac801feca47f040fc729b3c174
• https://git.kernel.org/stable/c/2705709f6574a088aab246af72fc95f2fea51484
• https://git.kernel.org/stable/c/35854ed5c40b02f95824e44398f9d2ba33727203
• https://git.kernel.org/stable/c/3d7e6ce34f4fcc7083510c28b17a7c36462a25d4