---
id: CVE-2026-89470
title: >-
  kernel: power: supply: cros_usbpd: Limit port counts to EC_USB_PD_MAX_PORTS
  (CVE-2026-89470)
summary: >-
  A flaw was found in the Linux kernel's `cros_usbpd-charger` driver. This
  driver, which manages USB power delivery, incorrectly processes port count
  information from an embedded controller. A malicious embedded controller could
  provide an e…
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-787
vendor: Red Hat
product: Linux
affected:
  - >-
    Linux >= 3af15cfacd1eef7f223802d49a88cae23c509183 <
    e951b65ef1699439079b723ca5c72cbe44771647
  - >-
    Linux >= 3af15cfacd1eef7f223802d49a88cae23c509183 <
    3ce9218639ff62d011eb8aca0943aa670a654c7b
  - >-
    Linux >= 3af15cfacd1eef7f223802d49a88cae23c509183 <
    dce1750ddbd3380b1f6090dda2b07d2ebea2261d
  - >-
    Linux >= 3af15cfacd1eef7f223802d49a88cae23c509183 <
    3262977a05b23d1be9fc86727a2b490ec997543e
  - >-
    Linux >= 3af15cfacd1eef7f223802d49a88cae23c509183 <
    fd5f289cca04ad869b34fc9ccb647670bfdb60ac
  - >-
    Linux >= 3af15cfacd1eef7f223802d49a88cae23c509183 <
    4b1f2be1e1b74a50386ba718de3d62bfcf5ee701
  - >-
    Linux >= 3af15cfacd1eef7f223802d49a88cae23c509183 <
    304a29ac55ba3ee6eceaf7d83d09cd9709f3bf60
  - >-
    Linux >= 3af15cfacd1eef7f223802d49a88cae23c509183 <
    657cd3a42e937276262c0a8ae6b01a87004309de
  - Linux 4.20
published: '2026-09-11'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T09:43:00+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89470.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89470.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89470'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532525'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89470'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89470'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89470.mbox
  - url: 'https://git.kernel.org/stable/c/e951b65ef1699439079b723ca5c72cbe44771647'
  - url: 'https://git.kernel.org/stable/c/3ce9218639ff62d011eb8aca0943aa670a654c7b'
  - url: 'https://git.kernel.org/stable/c/dce1750ddbd3380b1f6090dda2b07d2ebea2261d'
  - url: 'https://git.kernel.org/stable/c/3262977a05b23d1be9fc86727a2b490ec997543e'
  - url: 'https://git.kernel.org/stable/c/fd5f289cca04ad869b34fc9ccb647670bfdb60ac'
  - url: 'https://git.kernel.org/stable/c/4b1f2be1e1b74a50386ba718de3d62bfcf5ee701'
  - url: 'https://git.kernel.org/stable/c/304a29ac55ba3ee6eceaf7d83d09cd9709f3bf60'
  - url: 'https://git.kernel.org/stable/c/657cd3a42e937276262c0a8ae6b01a87004309de'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.00196
epssPercentile: 0.08197
scores:
  vendor: 5.5
  cna: 8.4
ingestedAt: '2026-09-14T15:23:07.453Z'
---

## Overview

A flaw was found in the Linux kernel's `cros_usbpd-charger` driver. This driver, which manages USB power delivery, incorrectly processes port count information from an embedded controller. A malicious embedded controller could provide an exaggerated port count, leading to an out-of-bounds write and subsequent memory corruption. This vulnerability could allow an attacker to cause system instability or potentially gain unauthorized control of the system.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89470.json)

**kernel: power: supply: cros_usbpd: Limit port counts to EC_USB_PD_MAX_PORTS** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-15.

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.