---
id: CVE-2025-39705
title: 'drm/amd/display: fix a Null pointer dereference vulnerability'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/amd/display: fix a Null pointer dereference vulnerability

  [Why]
  A null pointer dereference vulnerability exists in the AMD display driver's
  (DC module) cleanup fun…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <
    0d9f4f202de1522aadc7a827aba0ae92b3d70937
  - >-
    Linux >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <
    0961673cc5f0055957aa46f25eb4ef6c07e00165
  - >-
    Linux >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <
    4ade995b9b25b3c6e8dc42c27070340f1358d8c8
  - >-
    Linux >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <
    1bcf63a44381691d6192872801f830ce3250e367
  - Linux 4.15
published: '2025-09-05'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T12:37:16.991Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-39705'
references:
  - url: 'https://git.kernel.org/stable/c/0d9f4f202de1522aadc7a827aba0ae92b3d70937'
  - url: 'https://git.kernel.org/stable/c/0961673cc5f0055957aa46f25eb4ef6c07e00165'
  - url: 'https://git.kernel.org/stable/c/4ade995b9b25b3c6e8dc42c27070340f1358d8c8'
  - url: 'https://git.kernel.org/stable/c/1bcf63a44381691d6192872801f830ce3250e367'
tags:
  - cve.org
epss: 0.00196
epssPercentile: 0.09181
ingestedAt: '2026-10-21T12:48:53.700Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: fix a Null pointer dereference vulnerability

[Why]
A null pointer dereference vulnerability exists in the AMD display driver's
(DC module) cleanup function dc_destruct().
When display control context (dc->ctx) construction fails
(due to memory allocation failure), this pointer remains NULL.
During subsequent error handling when dc_destruct() is called,
there's no NULL check before dereferencing the perf_trace member
(dc->ctx->perf_trace), causing a kernel null pointer dereference crash.

[How]
Check if dc->ctx is non-NULL before dereferencing.

(Updated commit text and removed unnecessary error message)
(cherry picked from commit 9dd8e2ba268c636c240a918e0a31e6feaee19404)

## Affected

- `Linux >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < 0d9f4f202de1522aadc7a827aba0ae92b3d70937`
- `Linux >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < 0961673cc5f0055957aa46f25eb4ef6c07e00165`
- `Linux >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < 4ade995b9b25b3c6e8dc42c27070340f1358d8c8`
- `Linux >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < 1bcf63a44381691d6192872801f830ce3250e367`
- `Linux 4.15`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.