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CVE-2026-89470

8.4 · HIGH

In the Linux kernel, the following vulnerability has been resolved: power: supply: cros_usbpd: Limit port counts to EC_USB_PD_MAX_PORTS Currently the cros_usbpd-charger driver probe iterates base…

Published Sep 11, 2026EPSS 0.14%

Overview

CVE-2026-89470 is a high-severity vulnerability. It was published on September 11, 2026 and has a CVSS 3.1 base score of 8.4 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.4, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

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

power: supply: cros_usbpd: Limit port counts to EC_USB_PD_MAX_PORTS

Currently the cros_usbpd-charger driver probe iterates based on raw

charger port count returned by the embedded controller. The only check

is against the number of USB PD ports which the embedded controller

also defines. A malicious embedded controller could return an inaccurate

port count (up to 255) resulting in an out of bounds write and

subsequent memory corruption.

Update helper functions in cros_usbpd-charger to limit port counts to

EC_USB_PD_MAX_PORTS.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/304a29ac55ba3ee6eceaf7d83d09cd9709f3bf60Refgit.kernel.org/stable/c/3262977a05b23d1be9fc86727a2b490ec997543eRefgit.kernel.org/stable/c/3ce9218639ff62d011eb8aca0943aa670a654c7bRefgit.kernel.org/stable/c/4b1f2be1e1b74a50386ba718de3d62bfcf5ee701Refgit.kernel.org/stable/c/657cd3a42e937276262c0a8ae6b01a87004309deRefgit.kernel.org/stable/c/dce1750ddbd3380b1f6090dda2b07d2ebea2261dRefgit.kernel.org/stable/c/e951b65ef1699439079b723ca5c72cbe44771647Refgit.kernel.org/stable/c/fd5f289cca04ad869b34fc9ccb647670bfdb60ac

How CyberStrike helps

Frequently asked questions

What is CVE-2026-89470?

CVE-2026-89470 is a high-severity vulnerability. It was published on September 11, 2026 and has a CVSS 3.1 base score of 8.4 (HIGH).

How severe is CVE-2026-89470?

This vulnerability has a CVSS 3.1 base score of 8.4, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-89470?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-89470?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-89470 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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