PT-2026-39092 · Linux · Linux Kernel

Michal · Published 2026-05-08 · Updated 2026-05-15 · CVE-2026-43431

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A NULL pointer dereference occurs when reading portli debugfs files. This issue arises when the number of port registers counted in xhci->max ports exceeds the ports reported by Supported Protocol capabilities, which can happen if max ports is greater than the maximum port number or if gaps exist between ports of different speeds. In these scenarios, port->rhub becomes NULL, preventing access to the xhci structure.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2026-43431

Affected Products

Linux Kernel

References · 11

• https://git.kernel.org/stable/c/ae4ff9dead5efa2025eddfcdb29411432bf40a7c · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-43431 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43431 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-43431 · Vendor Advisory
• https://git.kernel.org/stable/c/9c8bef223c6e991276188d30d74bdb2cbd8be652 · Patch
• https://ubuntu.com/security/CVE-2026-43431 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-43431 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43431 · Vendor Advisory
• https://twitter.com/hetmehtaa/status/2055151398283837677 · Twitter Post
• https://twitter.com/CVEnew/status/2052767640284983744 · Twitter Post
• https://git.kernel.org/linus/ae4ff9dead5efa2025eddfcdb29411432bf40a7c · Note