---
id: CVE-2025-37967
title: 'usb: typec: ucsi: displayport: Fix deadlock'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  usb: typec: ucsi: displayport: Fix deadlock

  This patch introduces the ucsi_con_mutex_lock / ucsi_con_mutex_unlock
  functions to the UCSI driver. ucsi_con_mutex_lock ens…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= af8622f6a585d8d82b11cd7987e082861fd0edd3 <
    f4bd982563c2fd41ec9ca6c517c392d759db801c
  - >-
    Linux >= af8622f6a585d8d82b11cd7987e082861fd0edd3 <
    f32451ca4cb7dc53f2a0e2e66b84d34162747eb7
  - >-
    Linux >= af8622f6a585d8d82b11cd7987e082861fd0edd3 <
    962ce9028ca6eb450d5c205238a3ee27de9d214d
  - >-
    Linux >= af8622f6a585d8d82b11cd7987e082861fd0edd3 <
    5924b324468845fc795bd76f588f51d7ab4f202d
  - >-
    Linux >= af8622f6a585d8d82b11cd7987e082861fd0edd3 <
    61fc1a8e1e10cc784cab5829930838aaf1d37af5
  - >-
    Linux >= af8622f6a585d8d82b11cd7987e082861fd0edd3 <
    364618c89d4c57c85e5fc51a2446cd939bf57802
  - Linux 5.2
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T20:46:37.402799Z'
published: '2025-05-20'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T20:52:09.875Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-37967'
references:
  - url: 'https://git.kernel.org/stable/c/f4bd982563c2fd41ec9ca6c517c392d759db801c'
  - url: 'https://git.kernel.org/stable/c/f32451ca4cb7dc53f2a0e2e66b84d34162747eb7'
  - url: 'https://git.kernel.org/stable/c/962ce9028ca6eb450d5c205238a3ee27de9d214d'
  - url: 'https://git.kernel.org/stable/c/5924b324468845fc795bd76f588f51d7ab4f202d'
  - url: 'https://git.kernel.org/stable/c/61fc1a8e1e10cc784cab5829930838aaf1d37af5'
  - url: 'https://git.kernel.org/stable/c/364618c89d4c57c85e5fc51a2446cd939bf57802'
tags:
  - cve.org
epss: 0.00159
epssPercentile: 0.05047
ingestedAt: '2026-11-05T22:38:31.898Z'
---

## Overview

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

usb: typec: ucsi: displayport: Fix deadlock

This patch introduces the ucsi_con_mutex_lock / ucsi_con_mutex_unlock
functions to the UCSI driver. ucsi_con_mutex_lock ensures the connector
mutex is only locked if a connection is established and the partner pointer
is valid. This resolves a deadlock scenario where
ucsi_displayport_remove_partner holds con->mutex waiting for
dp_altmode_work to complete while dp_altmode_work attempts to acquire it.

## Affected

- `Linux >= af8622f6a585d8d82b11cd7987e082861fd0edd3 < f4bd982563c2fd41ec9ca6c517c392d759db801c`
- `Linux >= af8622f6a585d8d82b11cd7987e082861fd0edd3 < f32451ca4cb7dc53f2a0e2e66b84d34162747eb7`
- `Linux >= af8622f6a585d8d82b11cd7987e082861fd0edd3 < 962ce9028ca6eb450d5c205238a3ee27de9d214d`
- `Linux >= af8622f6a585d8d82b11cd7987e082861fd0edd3 < 5924b324468845fc795bd76f588f51d7ab4f202d`
- `Linux >= af8622f6a585d8d82b11cd7987e082861fd0edd3 < 61fc1a8e1e10cc784cab5829930838aaf1d37af5`
- `Linux >= af8622f6a585d8d82b11cd7987e082861fd0edd3 < 364618c89d4c57c85e5fc51a2446cd939bf57802`
- `Linux 5.2`

## Remediation

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