---
id: CVE-2024-49970
title: 'drm/amd/display: Implement bounds check for stream encoder creation in DCN401'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/amd/display: Implement bounds check for stream encoder creation in DCN401

  'stream_enc_regs' array is an array of dcn10_stream_enc_registers
  structures. The array i…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <
    664f12d9ebdfdfb9c05e5cb31f268e92fb9042fe
  - >-
    Linux >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <
    00872dcc2a3e4a42155c2f3b7f21952a62301035
  - >-
    Linux >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <
    b219b46ad42df1dea9258788bcfea37181f3ccb2
  - >-
    Linux >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <
    bdf606810210e8e07a0cdf1af3c467291363b295
  - Linux 4.15
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2024-10-22T13:33:55.440679Z'
published: '2024-10-21'
updated: '2026-10-30'
sourceUpdated: '2026-10-30T12:19:47.080Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2024-49970'
references:
  - url: 'https://git.kernel.org/stable/c/664f12d9ebdfdfb9c05e5cb31f268e92fb9042fe'
  - url: 'https://git.kernel.org/stable/c/00872dcc2a3e4a42155c2f3b7f21952a62301035'
  - url: 'https://git.kernel.org/stable/c/b219b46ad42df1dea9258788bcfea37181f3ccb2'
  - url: 'https://git.kernel.org/stable/c/bdf606810210e8e07a0cdf1af3c467291363b295'
tags:
  - cve.org
epss: 0.00295
epssPercentile: 0.22149
ingestedAt: '2026-10-21T12:48:53.727Z'
---

## Overview

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

drm/amd/display: Implement bounds check for stream encoder creation in DCN401

'stream_enc_regs' array is an array of dcn10_stream_enc_registers
structures. The array is initialized with four elements, corresponding
to the four calls to stream_enc_regs() in the array initializer. This
means that valid indices for this array are 0, 1, 2, and 3.

The error message 'stream_enc_regs' 4 <= 5 below, is indicating that
there is an attempt to access this array with an index of 5, which is
out of bounds. This could lead to undefined behavior

Here, eng_id is used as an index to access the stream_enc_regs array. If
eng_id is 5, this would result in an out-of-bounds access on the
stream_enc_regs array.

Thus fixing Buffer overflow error in dcn401_stream_encoder_create

Found by smatch:
drivers/gpu/drm/amd/amdgpu/../display/dc/resource/dcn401/dcn401_resource.c:1209 dcn401_stream_encoder_create() error: buffer overflow 'stream_enc_regs' 4 <= 5

## Affected

- `Linux >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < 664f12d9ebdfdfb9c05e5cb31f268e92fb9042fe`
- `Linux >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < 00872dcc2a3e4a42155c2f3b7f21952a62301035`
- `Linux >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < b219b46ad42df1dea9258788bcfea37181f3ccb2`
- `Linux >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < bdf606810210e8e07a0cdf1af3c467291363b295`
- `Linux 4.15`

## Remediation

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