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CVE-2026-89471

kernel: power: supply: cros_usbpd-charger: bound the EC-reported port count

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · September 11, 2026

Updated · September 29, 2026

Description

A flaw was found in the Linux kernel's cros_usbpd-charger driver. A malicious or compromised embedded controller (EC) can report an excessive number of USB Power Delivery (PD) ports. This causes the driver to write beyond the allocated memory buffer when populating a fixed-size array for port data, leading to a slab out-of-bounds write. This memory corruption could potentially be exploited by a local attacker.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-787 · Out-of-bounds Write