---
id: CVE-2026-89473
title: 'power: supply: bq25890: Fix power_supply reference leak'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  power: supply: bq25890: Fix power_supply reference leak

  bq25890_fw_probe() acquires a reference to a secondary charger using
  power_supply_get_by_name(), but the refere…
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-772
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= d54bf877fd878ee45cbc88d399fb98b0b1c4484d <
    976c10d883a02968f3f58be0cee499d1fd2ba68a
  - >-
    Linux >= d54bf877fd878ee45cbc88d399fb98b0b1c4484d <
    81b558afda9321c1a70971a39071d156f3e26950
  - >-
    Linux >= d54bf877fd878ee45cbc88d399fb98b0b1c4484d <
    238320ad029a3eedabb86286a28cab55bca629b9
  - >-
    Linux >= d54bf877fd878ee45cbc88d399fb98b0b1c4484d <
    58f1025eca92734eadc063715b98f62538286468
  - >-
    Linux >= d54bf877fd878ee45cbc88d399fb98b0b1c4484d <
    863c32a83e4235eb0cbf6106f2b124e645302156
  - Linux 6.3
published: '2026-09-11'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T08:47:22.219Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-89473'
references:
  - url: 'https://git.kernel.org/stable/c/976c10d883a02968f3f58be0cee499d1fd2ba68a'
  - url: 'https://git.kernel.org/stable/c/81b558afda9321c1a70971a39071d156f3e26950'
  - url: 'https://git.kernel.org/stable/c/238320ad029a3eedabb86286a28cab55bca629b9'
  - url: 'https://git.kernel.org/stable/c/58f1025eca92734eadc063715b98f62538286468'
  - url: 'https://git.kernel.org/stable/c/863c32a83e4235eb0cbf6106f2b124e645302156'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89473.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89473'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532246'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89473'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89473'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89473.mbox
tags:
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00206
epssPercentile: 0.10478
ingestedAt: '2026-09-14T15:23:07.453Z'
---

## Overview

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

power: supply: bq25890: Fix power_supply reference leak

bq25890_fw_probe() acquires a reference to a secondary charger using
power_supply_get_by_name(), but the reference is not released on later
probe failures or on driver detach.

In particular, failures after bq25890_fw_probe() returns successfully,
such as a failure in bq25890_hw_init(), also leak the reference.

Register a device-managed cleanup action immediately after acquiring
the secondary charger. This releases the reference on all subsequent
probe failures and on driver detach.

Found by code review.

## Affected

- `Linux >= d54bf877fd878ee45cbc88d399fb98b0b1c4484d < 976c10d883a02968f3f58be0cee499d1fd2ba68a`
- `Linux >= d54bf877fd878ee45cbc88d399fb98b0b1c4484d < 81b558afda9321c1a70971a39071d156f3e26950`
- `Linux >= d54bf877fd878ee45cbc88d399fb98b0b1c4484d < 238320ad029a3eedabb86286a28cab55bca629b9`
- `Linux >= d54bf877fd878ee45cbc88d399fb98b0b1c4484d < 58f1025eca92734eadc063715b98f62538286468`
- `Linux >= d54bf877fd878ee45cbc88d399fb98b0b1c4484d < 863c32a83e4235eb0cbf6106f2b124e645302156`
- `Linux 6.3`

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89473.json)