---
id: CVE-2025-71198
title: 'iio: imu: st_lsm6dsx: fix iio_chan_spec for sensors without event detection'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  iio: imu: st_lsm6dsx: fix iio_chan_spec for sensors without event detection

  The st_lsm6dsx_acc_channels array of struct iio_chan_spec has a non-NULL
  event_spec field, …
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= b5969abfa8b8ed43ebd93479d394f664bd4a5a87 <
    33c683417232b9111e29458954529942137780a3
  - >-
    Linux >= b5969abfa8b8ed43ebd93479d394f664bd4a5a87 <
    7673167fac9323110973a3300637adba7d45de3a
  - >-
    Linux >= b5969abfa8b8ed43ebd93479d394f664bd4a5a87 <
    4d60ffcdedfe2cdb68a1cde19bb292bc67451629
  - >-
    Linux >= b5969abfa8b8ed43ebd93479d394f664bd4a5a87 <
    81ed6e42d6e555dd978c9dd5e3f7c20cb121221b
  - >-
    Linux >= b5969abfa8b8ed43ebd93479d394f664bd4a5a87 <
    c34e2e2d67b3bb8d5a6d09b0d6dac845cdd13fb3
  - Linux 5.5
published: '2026-02-04'
updated: '2026-10-30'
sourceUpdated: '2026-10-30T12:23:32.365Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-71198'
references:
  - url: 'https://git.kernel.org/stable/c/33c683417232b9111e29458954529942137780a3'
  - url: 'https://git.kernel.org/stable/c/7673167fac9323110973a3300637adba7d45de3a'
  - url: 'https://git.kernel.org/stable/c/4d60ffcdedfe2cdb68a1cde19bb292bc67451629'
  - url: 'https://git.kernel.org/stable/c/81ed6e42d6e555dd978c9dd5e3f7c20cb121221b'
  - url: 'https://git.kernel.org/stable/c/c34e2e2d67b3bb8d5a6d09b0d6dac845cdd13fb3'
tags:
  - cve.org
epss: 0.00201
epssPercentile: 0.10065
ingestedAt: '2026-11-05T15:02:32.174Z'
---

## Overview

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

iio: imu: st_lsm6dsx: fix iio_chan_spec for sensors without event detection

The st_lsm6dsx_acc_channels array of struct iio_chan_spec has a non-NULL
event_spec field, indicating support for IIO events. However, event
detection is not supported for all sensors, and if userspace tries to
configure accelerometer wakeup events on a sensor device that does not
support them (e.g. LSM6DS0), st_lsm6dsx_write_event() dereferences a NULL
pointer when trying to write to the wakeup register.
Define an additional struct iio_chan_spec array whose members have a NULL
event_spec field, and use this array instead of st_lsm6dsx_acc_channels for
sensors without event detection capability.

## Affected

- `Linux >= b5969abfa8b8ed43ebd93479d394f664bd4a5a87 < 33c683417232b9111e29458954529942137780a3`
- `Linux >= b5969abfa8b8ed43ebd93479d394f664bd4a5a87 < 7673167fac9323110973a3300637adba7d45de3a`
- `Linux >= b5969abfa8b8ed43ebd93479d394f664bd4a5a87 < 4d60ffcdedfe2cdb68a1cde19bb292bc67451629`
- `Linux >= b5969abfa8b8ed43ebd93479d394f664bd4a5a87 < 81ed6e42d6e555dd978c9dd5e3f7c20cb121221b`
- `Linux >= b5969abfa8b8ed43ebd93479d394f664bd4a5a87 < c34e2e2d67b3bb8d5a6d09b0d6dac845cdd13fb3`
- `Linux 5.5`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.