---
id: CVE-2026-89466
title: >-
  kernel: power: supply: qcom_battmgr: terminate the strings from firmware
  (CVE-2026-89466)
summary: >-
  A flaw was found in the Linux kernel's `qcom_battmgr` component, responsible
  for power supply management. This vulnerability occurs due to improper string
  termination when handling firmware-provided strings. A malicious or malformed
  firmwa…
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-125
vendor: Red Hat
product: Linux
affected:
  - >-
    Linux >= 29e8142b5623b5949587bcc4f591c4e6595c4aca <
    c06028db620854b11ad81b04b0a4e1ead930cb76
  - >-
    Linux >= 29e8142b5623b5949587bcc4f591c4e6595c4aca <
    0e70a9b0d16acf7adebc4f386178a95da27c0027
  - >-
    Linux >= 29e8142b5623b5949587bcc4f591c4e6595c4aca <
    ee053561e21ce1e1741dd64ca5ddcdb92e40edc1
  - >-
    Linux >= 29e8142b5623b5949587bcc4f591c4e6595c4aca <
    6cc6c28c9ab6e8ecf901397717a5b391b828cdaf
  - >-
    Linux >= 29e8142b5623b5949587bcc4f591c4e6595c4aca <
    ab1112df8f4ffa88cb024dd370c432ced80f77d8
  - Linux 6.3
published: '2026-09-11'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T20:07:49+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89466.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89466.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89466'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532242'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89466'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89466'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89466.mbox
  - url: 'https://git.kernel.org/stable/c/c06028db620854b11ad81b04b0a4e1ead930cb76'
  - url: 'https://git.kernel.org/stable/c/0e70a9b0d16acf7adebc4f386178a95da27c0027'
  - url: 'https://git.kernel.org/stable/c/ee053561e21ce1e1741dd64ca5ddcdb92e40edc1'
  - url: 'https://git.kernel.org/stable/c/6cc6c28c9ab6e8ecf901397717a5b391b828cdaf'
  - url: 'https://git.kernel.org/stable/c/ab1112df8f4ffa88cb024dd370c432ced80f77d8'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.00144
epssPercentile: 0.04021
scores:
  vendor: 5.5
  cna: 7.7
ingestedAt: '2026-09-14T15:23:07.453Z'
---

## Overview

A flaw was found in the Linux kernel's `qcom_battmgr` component, responsible for power supply management. This vulnerability occurs due to improper string termination when handling firmware-provided strings. A malicious or malformed firmware string that completely fills its buffer can lead to an out-of-bounds read, potentially disclosing sensitive information from adjacent memory locations to user space.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89466.json)

**kernel: power: supply: qcom_battmgr: terminate the strings from firmware** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-17.

Not affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

## Remediation

Refer to the advisory for fix availability.