---
id: CVE-2026-89463
title: 'kernel: power: supply: ucs1002: fix use-after-free on remove (CVE-2026-89463)'
summary: >-
  A flaw was found in the Linux kernel's `ucs1002` power supply driver. The
  driver does not properly cancel a delayed work item during device removal,
  leading to a use-after-free vulnerability. This issue allows the system to
  attempt to acce…
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: Red Hat
product: Red Hat OpenShift Container Platform 4
affected:
  - openshift_container_platform 4
published: '2026-09-11'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T12:25:29+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89463.json'
references:
  - 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
  - url: 'https://git.kernel.org/stable/c/35242c93d35f391afdc84cef6236b8ad57f1df24'
  - url: 'https://git.kernel.org/stable/c/39b60d615dfa1725c235351fb12bc72e5f8a8d32'
  - url: 'https://git.kernel.org/stable/c/4ca2a4678202f15eb790eb7f1d562061709caea7'
  - url: 'https://git.kernel.org/stable/c/609af0ceeaefdfa42cd01dd060b20f2e41f9a232'
  - url: 'https://git.kernel.org/stable/c/00c19f8a9a58a318a76fd6f735a8aab3f8ead393'
  - url: 'https://git.kernel.org/stable/c/a9a7bb801c443a4d9fc623c4a47deb53accb70bb'
  - url: 'https://git.kernel.org/stable/c/2ec4d203ecb06d327af67e32097fe8f774838a40'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00205
epssPercentile: 0.10904
ingestedAt: '2026-09-14T15:23:07.453Z'
---

## Overview

A flaw was found in the Linux kernel's `ucs1002` power supply driver. The driver does not properly cancel a delayed work item during device removal, leading to a use-after-free vulnerability. This issue allows the system to attempt to access memory that has already been freed, which can result in system instability or a denial of service.

## 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)

**kernel: power: supply: ucs1002: fix use-after-free on remove** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-16.

Affected:

- Red Hat OpenShift Container Platform 4

No fix planned:

- Red Hat OpenShift Container Platform 4

## Remediation

Fix deferred