---
id: CVE-2025-37870
title: 'drm/amd/display: prevent hang on link training fail'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/amd/display: prevent hang on link training fail

  [Why]
  When link training fails, the phy clock will be disabled. However, in
  enable_streams, it is assumed that link…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 7462475e3a06fbb0b36243b391296f9f411e9041 <
    52cdc47cf6519e2912a34d29b7eeb3f10ca85efa
  - >-
    Linux >= 7462475e3a06fbb0b36243b391296f9f411e9041 <
    0363c03672cd3191f037905bf981eb523a3b71b1
  - >-
    Linux >= 7462475e3a06fbb0b36243b391296f9f411e9041 <
    04bf4f2a497e9877c425c5124652e61fb8a1a0aa
  - >-
    Linux >= 7462475e3a06fbb0b36243b391296f9f411e9041 <
    8058061ed9d6bc259d1e678607b07d259342c08f
  - Linux 6.3
published: '2025-05-09'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T12:36:33.834Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-37870'
references:
  - url: 'https://git.kernel.org/stable/c/52cdc47cf6519e2912a34d29b7eeb3f10ca85efa'
  - url: 'https://git.kernel.org/stable/c/0363c03672cd3191f037905bf981eb523a3b71b1'
  - url: 'https://git.kernel.org/stable/c/04bf4f2a497e9877c425c5124652e61fb8a1a0aa'
  - url: 'https://git.kernel.org/stable/c/8058061ed9d6bc259d1e678607b07d259342c08f'
tags:
  - cve.org
epss: 0.00307
epssPercentile: 0.2339
ingestedAt: '2026-10-21T12:48:53.710Z'
---

## Overview

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

drm/amd/display: prevent hang on link training fail

[Why]
When link training fails, the phy clock will be disabled. However, in
enable_streams, it is assumed that link training succeeded and the
mux selects the phy clock, causing a hang when a register write is made.

[How]
When enable_stream is hit, check if link training failed. If it did, fall
back to the ref clock to avoid a hang and keep the system in a recoverable
state.

## Affected

- `Linux >= 7462475e3a06fbb0b36243b391296f9f411e9041 < 52cdc47cf6519e2912a34d29b7eeb3f10ca85efa`
- `Linux >= 7462475e3a06fbb0b36243b391296f9f411e9041 < 0363c03672cd3191f037905bf981eb523a3b71b1`
- `Linux >= 7462475e3a06fbb0b36243b391296f9f411e9041 < 04bf4f2a497e9877c425c5124652e61fb8a1a0aa`
- `Linux >= 7462475e3a06fbb0b36243b391296f9f411e9041 < 8058061ed9d6bc259d1e678607b07d259342c08f`
- `Linux 6.3`

## Remediation

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