---
id: CVE-2026-89463
title: 'power: supply: ucs1002: fix use-after-free on remove'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  power: supply: ucs1002: fix use-after-free on remove

  ucs1002 has no remove callback, so unbind runs entirely through devm.
  The alert IRQ handler queues the health_poll…
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-364
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 81196e2e57fc5b88f6b8ca98372a3dde047aa49d <
    00c19f8a9a58a318a76fd6f735a8aab3f8ead393
  - >-
    Linux >= 81196e2e57fc5b88f6b8ca98372a3dde047aa49d <
    a9a7bb801c443a4d9fc623c4a47deb53accb70bb
  - >-
    Linux >= 81196e2e57fc5b88f6b8ca98372a3dde047aa49d <
    2ec4d203ecb06d327af67e32097fe8f774838a40
  - >-
    Linux >= 81196e2e57fc5b88f6b8ca98372a3dde047aa49d <
    4ca2a4678202f15eb790eb7f1d562061709caea7
  - >-
    Linux >= 81196e2e57fc5b88f6b8ca98372a3dde047aa49d <
    39b60d615dfa1725c235351fb12bc72e5f8a8d32
  - >-
    Linux >= 81196e2e57fc5b88f6b8ca98372a3dde047aa49d <
    35242c93d35f391afdc84cef6236b8ad57f1df24
  - >-
    Linux >= 81196e2e57fc5b88f6b8ca98372a3dde047aa49d <
    609af0ceeaefdfa42cd01dd060b20f2e41f9a232
  - Linux 5.10
published: '2026-09-11'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T08:47:12.553Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-89463'
references:
  - url: 'https://git.kernel.org/stable/c/00c19f8a9a58a318a76fd6f735a8aab3f8ead393'
  - url: 'https://git.kernel.org/stable/c/a9a7bb801c443a4d9fc623c4a47deb53accb70bb'
  - url: 'https://git.kernel.org/stable/c/2ec4d203ecb06d327af67e32097fe8f774838a40'
  - url: 'https://git.kernel.org/stable/c/4ca2a4678202f15eb790eb7f1d562061709caea7'
  - url: 'https://git.kernel.org/stable/c/39b60d615dfa1725c235351fb12bc72e5f8a8d32'
  - url: 'https://git.kernel.org/stable/c/35242c93d35f391afdc84cef6236b8ad57f1df24'
  - url: 'https://git.kernel.org/stable/c/609af0ceeaefdfa42cd01dd060b20f2e41f9a232'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89463.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89463'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532374'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89463'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89463'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89463.mbox
tags:
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00211
epssPercentile: 0.11319
ingestedAt: '2026-09-14T15:23:07.453Z'
---

## Overview

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

power: supply: ucs1002: fix use-after-free on remove

ucs1002 has no remove callback, so unbind runs entirely through devm.
The alert IRQ handler queues the health_poll delayed work, and the work
reschedules itself while the chip reports a bad-health condition.  devm
frees the alert IRQ, which only synchronizes the handler; it does not
cancel the delayed work, which can then run after devm frees the driver
data and dereference it.

Register health_poll with devm_delayed_work_autocancel() before the
alert IRQ is requested.  devm then frees the IRQ before cancelling the
work, so the handler can no longer queue it and the work is cancelled
before the driver data is freed.

This issue was found by an in-house static analysis tool.

## Affected

- `Linux >= 81196e2e57fc5b88f6b8ca98372a3dde047aa49d < 00c19f8a9a58a318a76fd6f735a8aab3f8ead393`
- `Linux >= 81196e2e57fc5b88f6b8ca98372a3dde047aa49d < a9a7bb801c443a4d9fc623c4a47deb53accb70bb`
- `Linux >= 81196e2e57fc5b88f6b8ca98372a3dde047aa49d < 2ec4d203ecb06d327af67e32097fe8f774838a40`
- `Linux >= 81196e2e57fc5b88f6b8ca98372a3dde047aa49d < 4ca2a4678202f15eb790eb7f1d562061709caea7`
- `Linux >= 81196e2e57fc5b88f6b8ca98372a3dde047aa49d < 39b60d615dfa1725c235351fb12bc72e5f8a8d32`
- `Linux >= 81196e2e57fc5b88f6b8ca98372a3dde047aa49d < 35242c93d35f391afdc84cef6236b8ad57f1df24`
- `Linux >= 81196e2e57fc5b88f6b8ca98372a3dde047aa49d < 609af0ceeaefdfa42cd01dd060b20f2e41f9a232`
- `Linux 5.10`

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat OpenShift Container Platform 4 · updated 2026-09-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89463.json)