SB20261022364 - NULL pointer dereference in Linux kernel usb cdns3 driver

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Main Vulnerability Database SB20261022364

SB20261022364 - NULL pointer dereference in Linux kernel usb cdns3 driver

Published: October 22, 2026

Security Bulletin ID SB20261022364
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) NULL pointer dereference (CVE-ID: CVE-2026-98756)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local privileged user to cause a denial of service by crashing the Linux kernel.

The vulnerability exists due to a NULL pointer dereference in the Cadence USBSS driver's cdns3_pci_probe() function when probing the controller's second PCI function after the first function has been enabled but before its driver data has been stored. A local privileged user can potentially trigger this probe timing condition to cause pci_get_drvdata() to return NULL, leading to a kernel crash when the driver assigns wrap->devfn.


Remediation

Install update from vendor's website.

References