---
id: CVE-2026-98756
title: >-
  kernel: usb: cdns3: Fix NULL pointer dereference in cdns3_pci_probe
  (CVE-2026-98756)
summary: >-
  A flaw was found in the Linux kernel's Cadence USB3 driver. A local user could
  exploit this flaw to cause a Denial of Service (DoS) by crashing the system.
  During device discovery of a multi-function Cadence USBSS Peripheral Component
  Inte…
severity: medium
cvss: 4.1
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-476
vendor: Red Hat
product: Red Hat Enterprise Linux 10
affected:
  - enterprise_linux 10
published: '2026-10-18'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T04:06:24+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98756.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98756.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98756'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2555053'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98756'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98756'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98756.mbox
  - url: 'https://git.kernel.org/stable/c/dbdd0ca9a7eac140697a366f698a0e2bb02a06a1'
  - url: 'https://git.kernel.org/stable/c/549c04df02f1bb5a10342f32e2c87f5d27c97279'
  - url: 'https://git.kernel.org/stable/c/d16046f1ace2691b6a946f022fe6dc215936880b'
  - url: 'https://git.kernel.org/stable/c/45b606418bae73c7cde9f0e57e5b0977c816a7c0'
  - url: 'https://git.kernel.org/stable/c/e5052f2c5c73c1dcca42bafc0bc737af2b2af059'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00168
epssPercentile: 0.05987
ingestedAt: '2026-10-18T16:47:32.497Z'
---

## Overview

A flaw was found in the Linux kernel's Cadence USB3 driver. A local user could exploit this flaw to cause a Denial of Service (DoS) by crashing the system. During device discovery of a multi-function Cadence USBSS Peripheral Component Interconnect (PCI) device, the driver attempts to access shared data before the primary function has finished initializing it. This timing issue triggers a NULL pointer dereference, resulting in an unhandled kernel crash.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98756.json)

**kernel: usb: cdns3: Fix NULL pointer dereference in cdns3_pci_probe** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-23.

Affected:

- Red Hat Enterprise Linux 10

No fix planned:

- Red Hat Enterprise Linux 10

Not affected:

- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

## Remediation

Fix deferred