---
id: CVE-2023-53049
title: 'usb: ucsi: Fix NULL pointer deref in ucsi_connector_change()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  usb: ucsi: Fix NULL pointer deref in ucsi_connector_change()

  When ucsi_init() fails, ucsi->connector is NULL, yet in case of
  ucsi_acpi we may still get events which ca…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= bdc62f2bae8fb0e8e99574de5232f0a3c54a27df <
    a6adfe9bbd6ac11e398b54ccd99a0f8eea09f3c0
  - >-
    Linux >= bdc62f2bae8fb0e8e99574de5232f0a3c54a27df <
    7dd27aed9c456670b3882877ef17a48195f21693
  - >-
    Linux >= bdc62f2bae8fb0e8e99574de5232f0a3c54a27df <
    1c5abcb13491da8c049f20462189c12c753ba978
  - >-
    Linux >= bdc62f2bae8fb0e8e99574de5232f0a3c54a27df <
    7ef0423e43f877a328454059d46763043ce3da44
  - >-
    Linux >= bdc62f2bae8fb0e8e99574de5232f0a3c54a27df <
    f87fb985452ab2083967103ac00bfd68fb182764
  - Linux 5.5
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T20:15:26.195648Z'
published: '2025-05-02'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T20:20:56.363Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2023-53049'
references:
  - url: 'https://git.kernel.org/stable/c/a6adfe9bbd6ac11e398b54ccd99a0f8eea09f3c0'
  - url: 'https://git.kernel.org/stable/c/7dd27aed9c456670b3882877ef17a48195f21693'
  - url: 'https://git.kernel.org/stable/c/1c5abcb13491da8c049f20462189c12c753ba978'
  - url: 'https://git.kernel.org/stable/c/7ef0423e43f877a328454059d46763043ce3da44'
  - url: 'https://git.kernel.org/stable/c/f87fb985452ab2083967103ac00bfd68fb182764'
tags:
  - cve.org
epss: 0.00202
epssPercentile: 0.1014
ingestedAt: '2026-11-05T22:38:31.758Z'
---

## Overview

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

usb: ucsi: Fix NULL pointer deref in ucsi_connector_change()

When ucsi_init() fails, ucsi->connector is NULL, yet in case of
ucsi_acpi we may still get events which cause the ucs_acpi code to call
ucsi_connector_change(), which then derefs the NULL ucsi->connector
pointer.

Fix this by not setting ucsi->ntfy inside ucsi_init() until ucsi_init()
has succeeded, so that ucsi_connector_change() ignores the events
because UCSI_ENABLE_NTFY_CONNECTOR_CHANGE is not set in the ntfy mask.

## Affected

- `Linux >= bdc62f2bae8fb0e8e99574de5232f0a3c54a27df < a6adfe9bbd6ac11e398b54ccd99a0f8eea09f3c0`
- `Linux >= bdc62f2bae8fb0e8e99574de5232f0a3c54a27df < 7dd27aed9c456670b3882877ef17a48195f21693`
- `Linux >= bdc62f2bae8fb0e8e99574de5232f0a3c54a27df < 1c5abcb13491da8c049f20462189c12c753ba978`
- `Linux >= bdc62f2bae8fb0e8e99574de5232f0a3c54a27df < 7ef0423e43f877a328454059d46763043ce3da44`
- `Linux >= bdc62f2bae8fb0e8e99574de5232f0a3c54a27df < f87fb985452ab2083967103ac00bfd68fb182764`
- `Linux 5.5`

## Remediation

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