CVE-2026-45923

Summary

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

net: usb: catc: enable basic endpoint checking

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

  • usb_sndbulkpipe(usbdev, 1) and usb_rcvbulkpipe(usbdev, 1) for TX/RX
  • usb_rcvintpipe(usbdev, 2) for interrupt status

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

Add a catc_usb_ep enum for endpoint numbers, replacing magic constants throughout. Add usb_check_bulk_endpoints() and usb_check_int_endpoints() calls after usb_set_interface() to verify endpoint types before use, rejecting devices with mismatched descriptors at probe time.

Similar to

  • commit 90b7f2961798 ("net: usb: rtl8150: enable basic endpoint checking") which fixed the issue in rtl8150.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < eade522d3e6ac3f3bfb51bfa5b5b4b32bd0b846faffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ac7739b78ded519e1d9919a814da3b34120bec8caffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 163d04897e57633c5d2e69734e4e4b22bb63f50daffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a488001a8197da4f9c413eec8f6acbff71c60145affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 36c28b028efba0f42218d41fed12c47ce217c1f1affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1a42cfced8900d33d032c7ec338484855b61b8ccaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9e7021d2aeae57c323a6f722ed7915686cdcc123affected
LinuxLinux2.6.12affected
LinuxLinux0 < 2.6.12unaffected
LinuxLinux5.10.252 <= 5.10.*unaffected
LinuxLinux6.1.165 <= 6.1.*unaffected
LinuxLinux6.6.128 <= 6.6.*unaffected
LinuxLinux6.12.75 <= 6.12.*unaffected
LinuxLinux6.18.14 <= 6.18.*unaffected
LinuxLinux6.19.4 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References