In the Linux kernel, the following vulnerability has been resolved:
xhci: Fix NULL pointer dereference when reading portli debugfs files
Michal reported and debgged a NULL pointer dereference bug in the
recently added portli debugfs files
Oops is caused when there are more port registers counted in
xhci->max_ports than ports reported by Supported Protocol capabilities.
This is possible if max_ports is more than maximum port number, or
if there are gaps between ports of different speeds the 'Supported
Protocol' capabilities.
In such cases port->rhub will be NULL so we can't reach xhci behind it.
Add an explicit NULL check for this case, and print portli in hex
without dereferencing port->rhub.
References
Configurations
Configuration 1 (hide)
|
History
20 May 2026, 18:21
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/9c8bef223c6e991276188d30d74bdb2cbd8be652 - Patch | |
| References | () https://git.kernel.org/stable/c/ae4ff9dead5efa2025eddfcdb29411432bf40a7c - Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* |
|
| CWE | CWE-476 | |
| First Time |
Linux linux Kernel
Linux |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
08 May 2026, 15:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-08 15:16
Updated : 2026-05-20 18:21
NVD link : CVE-2026-43431
Mitre link : CVE-2026-43431
CVE.ORG link : CVE-2026-43431
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-476
NULL Pointer Dereference