---
title: "CVE-2026-89470: Linux kernel cros_usbpd - Out of Bounds Read/Write"
description: "Linux kernel power supply cros_usbpd driver contains an out-of-bounds write vulnerability caused by improper validation of port counts from the embedded controller, letting a malicious embedded controller cause memory corruption, exploit requires a malicious embedded controller."
url: https://panop.io/threat-heartbeat/CVE-2026-89470/
---

# CVE-2026-89470 Linux kernel cros\_usbpd - Out of Bounds Read/Write

Linux kernel power supply cros\_usbpd driver contains an out-of-bounds write vulnerability caused by improper validation of port counts from the embedded controller, letting a malicious embedded controller cause memory corruption, exploit requires a malicious embedded controller.

CVSS base score 8.4 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.14% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89470)

## Details

Type

Out of Bounds Read/Write

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

11 September 2026

Updated

15 October 2026

## Vendor fix

Update to a Linux kernel version that limits port counts to EC\_USB\_PD\_MAX\_PORTS or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-89470](https://nvd.nist.gov/vuln/detail/CVE-2026-89470)
- [https://git.kernel.org/stable/c/4b1f2be1e1b74a50386ba718de3d62bfcf5ee701](https://git.kernel.org/stable/c/4b1f2be1e1b74a50386ba718de3d62bfcf5ee701)
- [https://git.kernel.org/stable/c/657cd3a42e937276262c0a8ae6b01a87004309de](https://git.kernel.org/stable/c/657cd3a42e937276262c0a8ae6b01a87004309de)
- [https://git.kernel.org/stable/c/fd5f289cca04ad869b34fc9ccb647670bfdb60ac](https://git.kernel.org/stable/c/fd5f289cca04ad869b34fc9ccb647670bfdb60ac)
- [https://git.kernel.org/stable/c/3262977a05b23d1be9fc86727a2b490ec997543e](https://git.kernel.org/stable/c/3262977a05b23d1be9fc86727a2b490ec997543e)
- [https://git.kernel.org/stable/c/3ce9218639ff62d011eb8aca0943aa670a654c7b](https://git.kernel.org/stable/c/3ce9218639ff62d011eb8aca0943aa670a654c7b)
- [https://git.kernel.org/stable/c/dce1750ddbd3380b1f6090dda2b07d2ebea2261d](https://git.kernel.org/stable/c/dce1750ddbd3380b1f6090dda2b07d2ebea2261d)
- [https://git.kernel.org/stable/c/e951b65ef1699439079b723ca5c72cbe44771647](https://git.kernel.org/stable/c/e951b65ef1699439079b723ca5c72cbe44771647)
- [https://git.kernel.org/stable/c/304a29ac55ba3ee6eceaf7d83d09cd9709f3bf60](https://git.kernel.org/stable/c/304a29ac55ba3ee6eceaf7d83d09cd9709f3bf60)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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