---
id: CVE-2026-53330
title: 'drm/amd/display: Fix out-of-bounds read in dp_get_eq_aux_rd_interval()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/amd/display: Fix out-of-bounds read in dp_get_eq_aux_rd_interval()

  [Why & How]
  The aux_rd_interval array in struct dc_lttpr_caps is declared with
  MAX_REPEATER_CNT …
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 8e5100a575433cc185a2e224280fbd873b6692dd <
    a632474c793b7f2a9bbd3d8e3d0dd7d256989300
  - >-
    Linux >= 8e5100a575433cc185a2e224280fbd873b6692dd <
    7c5f2d16a8f4464bf2a719ceb2316b8a6b87a3c0
  - >-
    Linux >= 8e5100a575433cc185a2e224280fbd873b6692dd <
    454d3b3d499c18373f8960d31aea48338a3ca9e0
  - >-
    Linux >= 8e5100a575433cc185a2e224280fbd873b6692dd <
    dc1490927d79fe9621e29f4a4f5d7b5ccb6aea3e
  - >-
    Linux >= 8e5100a575433cc185a2e224280fbd873b6692dd <
    e8b4d37eba05141ee01794fc6b7f2da808cee83b
  - Linux 5.6
published: '2026-07-01'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T12:42:32.704Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-53330'
references:
  - url: 'https://git.kernel.org/stable/c/a632474c793b7f2a9bbd3d8e3d0dd7d256989300'
  - url: 'https://git.kernel.org/stable/c/7c5f2d16a8f4464bf2a719ceb2316b8a6b87a3c0'
  - url: 'https://git.kernel.org/stable/c/454d3b3d499c18373f8960d31aea48338a3ca9e0'
  - url: 'https://git.kernel.org/stable/c/dc1490927d79fe9621e29f4a4f5d7b5ccb6aea3e'
  - url: 'https://git.kernel.org/stable/c/e8b4d37eba05141ee01794fc6b7f2da808cee83b'
tags:
  - cve.org
epss: 0.00131
epssPercentile: 0.02402
ingestedAt: '2026-10-21T12:48:53.616Z'
---

## Overview

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

drm/amd/display: Fix out-of-bounds read in dp_get_eq_aux_rd_interval()

[Why & How]
The aux_rd_interval array in struct dc_lttpr_caps is declared with
MAX_REPEATER_CNT - 1 (7) elements, indexed 0..6. However, the offset
parameter passed to dp_get_eq_aux_rd_interval() can be as large as
MAX_REPEATER_CNT (8) when a sink reports 8 LTTPR repeaters via DPCD.
This leads to an out-of-bounds read of aux_rd_interval[7] when offset
is 8.

Fix this by growing aux_rd_interval to MAX_REPEATER_CNT elements to
accommodate the full range of valid repeater counts defined by the DP
spec.

(cherry picked from commit a55a458a8df37a65ffda5cf721d554a8f74f6b04)

## Affected

- `Linux >= 8e5100a575433cc185a2e224280fbd873b6692dd < a632474c793b7f2a9bbd3d8e3d0dd7d256989300`
- `Linux >= 8e5100a575433cc185a2e224280fbd873b6692dd < 7c5f2d16a8f4464bf2a719ceb2316b8a6b87a3c0`
- `Linux >= 8e5100a575433cc185a2e224280fbd873b6692dd < 454d3b3d499c18373f8960d31aea48338a3ca9e0`
- `Linux >= 8e5100a575433cc185a2e224280fbd873b6692dd < dc1490927d79fe9621e29f4a4f5d7b5ccb6aea3e`
- `Linux >= 8e5100a575433cc185a2e224280fbd873b6692dd < e8b4d37eba05141ee01794fc6b7f2da808cee83b`
- `Linux 5.6`

## Remediation

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