NULL pointer dereference in Linux kernel - CVE-2026-43431
Published: May 8, 2026
Vulnerability identifier: #VU130747
CSH Severity: Low
CVSS v4.0: 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
CVE-ID: CVE-2026-43431
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in the xhci portli debugfs files when reading debugfs files. A local user can read a crafted portli debugfs file state to cause a denial of service.
The issue occurs when xhci->max_ports exceeds the ports reported by Supported Protocol capabilities, including cases with gaps between ports of different speeds.
How to mitigate CVE-2026-43431
Install security update from vendor's repository.