CVE-2026-80771
Received Received - Intake

HID Input Device Registration Issue in Linux Kernel

Publication date: 2026-09-04

Last updated on: 2026-09-04

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: HID: nintendo: register input device after capabilities are set input_register_device() exposes the device to userspace immediately. In joycon_input_create() it was called before joycon_config_rumble() configures the FF_RUMBLE capability and the memless force-feedback device, so a concurrent EVIOCSFF could dereference a NULL dev->ff. Registering early also means the initial udev event lacks button and axis information, which can make input managers ignore the device. Move input_register_device() to the end of joycon_input_create(), after all capabilities, the IMU input device and the force-feedback callbacks have been configured.

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Meta Information

Published
2026-09-04
Last Modified
2026-09-04
Generated
2026-09-04
AI Q&A
2026-09-04
EPSS Evaluated
N/A
NVD
CVE-2026-80771
EUVD
EUVD-2026-71414

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
nintendo joycon *
linux linux_kernel *

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability in the Linux kernel involves a race condition in the Nintendo Joy-Con driver. The input device was registered with userspace before all capabilities were properly set, leading to potential NULL pointer dereferences if a force-feedback operation was attempted concurrently. This could cause system crashes or instability.

Detection Guidance

This vulnerability is specific to the Linux kernel's HID Nintendo driver. Detection requires checking the kernel version and verifying if the affected joycon_input_create() function is present in the source code. No direct network detection commands are applicable.

Impact Analysis

If you use a Nintendo Joy-Con controller with a vulnerable Linux kernel, this flaw could cause system crashes or freezes when using force-feedback features. It might also prevent the controller from being recognized correctly by input managers due to missing initial button and axis information.

Mitigation Strategies

Update your Linux kernel to a version that includes the fix for this vulnerability. The patch moves input_register_device() to the end of joycon_input_create() to prevent race conditions and missing device capabilities.

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