SB20260528170 - NULL pointer dereference in Linux kernel usb cdns3 driver
Published: May 28, 2026
Security Bulletin ID
SB20260528170
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2026-45911)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in the cdns3 driver resume path when switching roles during resume. A local user can trigger a role change while the system is resuming to cause a denial of service.
The issue occurs when the driver switches to host mode during resume and the xhci-hcd device probe is deferred.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/49c99dc247ebf7361db9dbdade3dcebfffaf2c22
- https://git.kernel.org/stable/c/56289298431ed76700b9aac27a3b1d929fe61b8d
- https://git.kernel.org/stable/c/87e4b043b98a1d269be0b812f383881abee0ca45
- https://git.kernel.org/stable/c/94c742614899ff18a6b3e6f3cfbe7b9f36c865f3
- https://git.kernel.org/stable/c/d637f6ec149ffd2f8257bcc261561dc2e44dbb8c
- https://git.kernel.org/stable/c/fc086c0ce3db0eefbbeb66a5b1e626296336e33a
- https://git.kernel.org/stable/c/ff02bd303d2d78051771db51119d66c0cf442f47