🛡️ CVE-2026-45923 — kernel

🟡 CVSS 5.5 — Medium ✅ No Known Exploit NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

net: usb: catc: enable basic endpoint checking

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Affected software

CVE-2026-45923 is recorded against 3 packages.

  • kernel (from 6.19.0 up to 6.19.4)
  • linux-kernel
  • unknown

Timeline and source

Published on 27 May 2026 and last revised on 22 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

CVE-2026-45923 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Medium
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2026-05-27
Updated 2026-08-12
Modified 2026-07-22

Affected Packages

Software From version Fixed in
kernel 6.19.0 6.19.4
linux-kernel — —
unknown — —

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