---
id: CVE-2026-89466
title: 'power: supply: qcom_battmgr: terminate the strings from firmware'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  power: supply: qcom_battmgr: terminate the strings from firmware

  The qcom_battmgr_sc8280xp_strcpy() takes a Pascal-style string when the
  firmware sends one. Otherwise …
severity: high
cvss: 7.7
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-125
vendor: Linux
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: '2026-10-19'
sourceUpdated: '2026-10-19T08:47:15.439Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-89466'
references:
  - 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'
  - 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
tags:
  - cve.org
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.00142
epssPercentile: 0.0345
scores:
  cna: 7.7
  vendor: 5.5
ingestedAt: '2026-09-14T15:23:07.453Z'
---

## Overview

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

power: supply: qcom_battmgr: terminate the strings from firmware

The qcom_battmgr_sc8280xp_strcpy() takes a Pascal-style string when the
firmware sends one. Otherwise it copies all BATTMGR_STRING_LEN bytes and
leaves the destination without a terminator.

Those destinations are model_number, serial_number and oem_info, each
BATTMGR_STRING_LEN and declared next to each other. They go out to user
space as val->strval, which power_supply_format_property() prints with
"%s", so a firmware string that fills the whole field makes that read run
into the following members.

Use strscpy() so the copy always terminates, the way the SM8350 path
already does for the same field.

## Affected

- `Linux >= 29e8142b5623b5949587bcc4f591c4e6595c4aca < c06028db620854b11ad81b04b0a4e1ead930cb76`
- `Linux >= 29e8142b5623b5949587bcc4f591c4e6595c4aca < 0e70a9b0d16acf7adebc4f386178a95da27c0027`
- `Linux >= 29e8142b5623b5949587bcc4f591c4e6595c4aca < ee053561e21ce1e1741dd64ca5ddcdb92e40edc1`
- `Linux >= 29e8142b5623b5949587bcc4f591c4e6595c4aca < 6cc6c28c9ab6e8ecf901397717a5b391b828cdaf`
- `Linux >= 29e8142b5623b5949587bcc4f591c4e6595c4aca < ab1112df8f4ffa88cb024dd370c432ced80f77d8`
- `Linux 6.3`

## Remediation

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

## Vendor advisories

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