Null Pointer Dereference in Linux AMD DRM Display Driver

Publication date: 2026-04-22

Last updated on: 2026-05-07

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: check if ext_caps is valid in BL setup LVDS connectors don't have extended backlight caps so check if the pointer is valid before accessing it. (cherry picked from commit 3f797396d7f4eb9bb6eded184bbc6f033628a6f6)

CVSS Scores

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Meta Information

Published

2026-04-22

Last Modified

2026-05-07

Generated

2026-07-06

AI Q&A

2026-04-22

EPSS Evaluated

2026-07-05

NVD

CVE-2026-31460

EUVD

EUVD-2026-24799

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	From 6.19 (inc) to 6.19.11 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability exists in the Linux kernel within the drm/amd/display component. It involves the handling of extended backlight capabilities (ext_caps) during backlight (BL) setup. Specifically, LVDS connectors do not have extended backlight capabilities, so the code must check if the pointer to ext_caps is valid before accessing it. Failure to do this check could lead to invalid memory access.

Impact Analysis

If the pointer to extended backlight capabilities is accessed without validation, it could cause the system to behave unexpectedly, potentially leading to crashes or instability in the display subsystem of the Linux kernel. This could affect system reliability and availability.

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