CVE-2026-89470

Received Received - Intake

Out-of-Bounds Write in Cros USBPD Charger Driver

Publication date: 2026-09-11

Last updated on: 2026-09-14

Assigner: kernel.org

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-11

Last Modified

2026-09-14

Generated

2026-10-02

AI Q&A

2026-09-12

EPSS Evaluated

2026-10-01

NVD

CVE-2026-89470

EUVD

EUVD-2026-76376

Affected Vendors & Products

Vendor	Product	Version / Range
linux	kernel	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This is a memory corruption vulnerability in the Linux kernel's cros_usbpd-charger driver. A malicious embedded controller could return an incorrect port count (up to 255) during driver probe, causing an out-of-bounds write and memory corruption.

Detection Guidance

This vulnerability affects the Linux kernel's cros_usbpd-charger driver. To detect it, check if your system uses the affected driver by running: lsmod | grep cros_usbpd. If loaded, verify the kernel version with uname -a and compare against patched versions. Look for kernel logs indicating memory corruption or out-of-bounds writes related to USB PD ports.

Impact Analysis

This vulnerability could lead to system crashes, data corruption, or potential privilege escalation if exploited. Systems using the affected driver with a malicious or compromised embedded controller are at risk.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or similar standards. It involves a memory corruption issue in the Linux kernel's power supply subsystem, which could lead to system instability or crashes but does not inherently impact data protection or privacy requirements.

Mitigation Strategies

Immediately update your Linux kernel to a patched version that includes the fix for CVE-2026-89470. If updating is not immediately possible, consider disabling the cros_usbpd-charger driver if not required, using modprobe -r cros_usbpd_charger. Monitor kernel security advisories for further updates.

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