CVE-2026-53066

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DRM Plane State Error Pointer Dereference in Linux Kernel

Publication date: 2026-06-24

Last updated on: 2026-07-14

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: drm/sun4i: backend: fix error pointer dereference The function drm_atomic_get_plane_state() can return an error pointer and is not checked for it. Add error pointer check. Detected by Smatch: drivers/gpu/drm/sun4i/sun4i_backend.c:496 sun4i_backend_atomic_check() error: 'plane_state' dereferencing possible ERR_PTR()

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Meta Information

Published

2026-06-24

Last Modified

2026-07-14

Generated

2026-07-15

AI Q&A

2026-06-24

EPSS Evaluated

2026-07-13

NVD

CVE-2026-53066

EUVD

EUVD-2026-38934

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability exists in the Linux kernel, specifically in the drm/sun4i backend component. The function drm_atomic_get_plane_state() can return an error pointer, but the code does not check for this error pointer before dereferencing it. This can lead to an error pointer dereference issue.

The problem was detected by Smatch, a static analysis tool, which found that the 'plane_state' variable could be dereferenced even if it was an error pointer (ERR_PTR()). The fix involves adding a check for the error pointer before dereferencing.

Impact Analysis

This vulnerability involves an error pointer dereference in the Linux kernel's drm/sun4i backend. Specifically, the function drm_atomic_get_plane_state() can return an error pointer which was not checked, potentially leading to a kernel error or crash when the pointer is dereferenced without validation.

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