CVE-2026-89626
Received Received - Intake

HID Sensor Custom Field Sysfs Group Cleanup Flaw

Publication date: 2026-09-11

Last updated on: 2026-09-11

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: HID: sensor: custom: Fix field sysfs group cleanup on failure hid_sensor_custom_add_attributes() creates one sysfs group for each custom sensor field. If sysfs_create_group() fails after some groups have already been created, the function returns the error without removing the previously created groups. Add a local unwind path to remove the groups that were already created. With enable_sensor exposed only after the field attributes are ready, this path can free sensor_inst->fields without leaving enable_sensor able to access pointers into that array.

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Meta Information

Published
2026-09-11
Last Modified
2026-09-11
Generated
2026-09-12
AI Q&A
2026-09-11
EPSS Evaluated
N/A
NVD
CVE-2026-89626
EUVD
EUVD-2026-76538

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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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 improper cleanup of sysfs groups when adding custom sensor fields. If creating a sysfs group fails after some groups were already created, the function returns an error without removing the previously created groups, potentially leaving the system in an inconsistent state.

Detection Guidance

This vulnerability is specific to the Linux kernel's HID sensor subsystem and does not have network-based detection methods. To detect it, check if your kernel version includes the affected code by examining the hid-sensor-custom module. Use commands like 'modinfo hid_sensor_custom' or 'dmesg | grep hid_sensor_custom' to inspect the module and any related errors.

Impact Analysis

This vulnerability could lead to memory corruption or system instability if sysfs group creation fails during sensor initialization. It may cause crashes or unpredictable behavior in systems using custom HID sensors.

Mitigation Strategies

Apply the latest kernel updates from your Linux distribution to ensure the fix is included. If immediate patching is not possible, consider disabling the hid_sensor_custom module temporarily using 'modprobe -r hid_sensor_custom' if it is not critical for your system.

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