---
id: CVE-2024-49918
title: >-
  drm/amd/display: Add null check for head_pipe in
  dcn32_acquire_idle_pipe_for_head_pipe_in_layer
summary: >-
  In the Linux kernel, the following vulnerability has been resolved:


  drm/amd/display: Add null check for head_pipe in
  dcn32_acquire_idle_pipe_for_head_pipe_in_layer


  This commit addresses a potential null pointer dereference issue in the…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <
    180280f3c4621d699d903773bb84bf7f0bc6a891
  - >-
    Linux >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <
    4f47292f488fa7041284dca1f1244116c18721f1
  - >-
    Linux >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <
    96d4c2ee18d732a248d053aae8c4a27cb1d68d1c
  - >-
    Linux >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <
    ac2140449184a26eac99585b7f69814bd3ba8f2d
  - Linux 4.15
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2024-10-22T13:40:44.529990Z'
published: '2024-10-21'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T12:35:21.059Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2024-49918'
references:
  - url: 'https://git.kernel.org/stable/c/180280f3c4621d699d903773bb84bf7f0bc6a891'
  - url: 'https://git.kernel.org/stable/c/4f47292f488fa7041284dca1f1244116c18721f1'
  - url: 'https://git.kernel.org/stable/c/96d4c2ee18d732a248d053aae8c4a27cb1d68d1c'
  - url: 'https://git.kernel.org/stable/c/ac2140449184a26eac99585b7f69814bd3ba8f2d'
tags:
  - cve.org
epss: 0.00285
epssPercentile: 0.20848
ingestedAt: '2026-10-21T12:48:53.729Z'
---

## Overview

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

drm/amd/display: Add null check for head_pipe in dcn32_acquire_idle_pipe_for_head_pipe_in_layer

This commit addresses a potential null pointer dereference issue in the
`dcn32_acquire_idle_pipe_for_head_pipe_in_layer` function. The issue
could occur when `head_pipe` is null.

The fix adds a check to ensure `head_pipe` is not null before asserting
it. If `head_pipe` is null, the function returns NULL to prevent a
potential null pointer dereference.

Reported by smatch:
drivers/gpu/drm/amd/amdgpu/../display/dc/resource/dcn32/dcn32_resource.c:2690 dcn32_acquire_idle_pipe_for_head_pipe_in_layer() error: we previously assumed 'head_pipe' could be null (see line 2681)

## Affected

- `Linux >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < 180280f3c4621d699d903773bb84bf7f0bc6a891`
- `Linux >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < 4f47292f488fa7041284dca1f1244116c18721f1`
- `Linux >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < 96d4c2ee18d732a248d053aae8c4a27cb1d68d1c`
- `Linux >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < ac2140449184a26eac99585b7f69814bd3ba8f2d`
- `Linux 4.15`

## Remediation

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