PT-2026-38988 · Linux · Linux Kernel

Published 2026-05-08 · Updated 2026-05-21 · CVE-2026-43337

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 exists in the dcn401 init hw() function. The issue occurs because the function assumes the update bw bounding box() callback is valid when entering the update path. Specifically, a conditional check allows the freq changed branch to evaluate as true regardless of whether the callback pointer is valid, potentially leading to the execution of update bw bounding box() while it is NULL. This is resolved by validating the callback, dc->clk mgr, and bw params before use.

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-2026-43337

Affected Products

Linux Kernel

References · 13

• https://security-tracker.debian.org/tracker/CVE-2026-43337 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43337 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-43337 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43337 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43337 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-43337 · Security Note
• https://cve.org/CVERecord?id=CVE-2026-43337 · Security Note
• https://git.kernel.org/stable/c/e927b36ae18b66b49219eaa9f46edc7b4fdbb25e · Patch
• https://git.kernel.org/stable/c/10c13c111d0d7f8e101c742feff264fc98e3f9f7 · Patch
• https://git.kernel.org/stable/c/2d4a6f0702c5211e0be8b688c5fc24f082ec74d6 · Patch
• https://git.kernel.org/linus/e927b36ae18b66b49219eaa9f46edc7b4fdbb25e · Note
• https://docs.bell-sw.com/security/cves/CVE-2026-43337 · Note
• https://twitter.com/CVEnew/status/2052811045505228873 · Twitter Post