---
id: CVE-2026-89474
title: 'power: supply: bq256xx: drain usb_work before freeing the charger'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  power: supply: bq256xx: drain usb_work before freeing the charger

  The USB-PHY notifier queues usb_work, whose handler calls
  power_supply_changed(bq->charger). The rese…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe:
  - CWE-825
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 <
    9dcfdf6c598301b278f0b3490eb2bf4f600524e2
  - >-
    Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 <
    fd08d4dbbec07a44f01b0ddb041912be0dc88f8c
  - >-
    Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 <
    2cfb59dc9df8b5ebdd95e3d874a7f4690cee2bc8
  - >-
    Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 <
    9a467bd1e6811011026ad4c8de701b940d88a00c
  - >-
    Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 <
    9e1aba34df9a87d53460888e05718717c0f69343
  - >-
    Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 <
    c8addb842ae8dcf69c15fc976e33e3bd538a41d7
  - >-
    Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 <
    2dd6cd823777bea6d9a880a12a92a73ec76aee0b
  - Linux 5.12
published: '2026-09-11'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T08:47:23.191Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-89474'
references:
  - url: 'https://git.kernel.org/stable/c/9dcfdf6c598301b278f0b3490eb2bf4f600524e2'
  - url: 'https://git.kernel.org/stable/c/fd08d4dbbec07a44f01b0ddb041912be0dc88f8c'
  - url: 'https://git.kernel.org/stable/c/2cfb59dc9df8b5ebdd95e3d874a7f4690cee2bc8'
  - url: 'https://git.kernel.org/stable/c/9a467bd1e6811011026ad4c8de701b940d88a00c'
  - url: 'https://git.kernel.org/stable/c/9e1aba34df9a87d53460888e05718717c0f69343'
  - url: 'https://git.kernel.org/stable/c/c8addb842ae8dcf69c15fc976e33e3bd538a41d7'
  - url: 'https://git.kernel.org/stable/c/2dd6cd823777bea6d9a880a12a92a73ec76aee0b'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89474.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89474'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532371'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89474'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89474'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89474.mbox
tags:
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00173
epssPercentile: 0.06649
ingestedAt: '2026-09-14T15:23:07.453Z'
---

## Overview

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

power: supply: bq256xx: drain usb_work before freeing the charger

The USB-PHY notifier queues usb_work, whose handler calls
power_supply_changed(bq->charger). The reset devm action only unregisters
the notifier and was registered before the power supplies, so devm frees
bq->charger on unwind before the action runs; a usb_work still queued can
then dereference it.

Register the reset action after the power supplies, so it unregisters
the notifiers and drains usb_work before the supplies are released.
Initialize usb_work and obtain the PHY references before registering
the notifiers, so the worker cannot run before the supplies exist.

Found by static analysis.

## Affected

- `Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 < 9dcfdf6c598301b278f0b3490eb2bf4f600524e2`
- `Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 < fd08d4dbbec07a44f01b0ddb041912be0dc88f8c`
- `Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 < 2cfb59dc9df8b5ebdd95e3d874a7f4690cee2bc8`
- `Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 < 9a467bd1e6811011026ad4c8de701b940d88a00c`
- `Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 < 9e1aba34df9a87d53460888e05718717c0f69343`
- `Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 < c8addb842ae8dcf69c15fc976e33e3bd538a41d7`
- `Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 < 2dd6cd823777bea6d9a880a12a92a73ec76aee0b`
- `Linux 5.12`

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89474.json)