CVE-2026-43431
kernel: xhci: Fix NULL pointer dereference when reading portli debugfs files
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 8, 2026
Updated · June 28, 2026
Description
A flaw was found in the Linux kernel's xhci host controller driver. This vulnerability occurs when the number of port registers counted in xhci->max_ports is greater than the ports reported by Supported Protocol capabilities. This can lead to a NULL pointer dereference, causing a kernel crash and resulting in a denial of service.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 · NULL Pointer Dereference