---
id: CVE-2026-81017
title: 'platform/chrome: sensorhub: Bound the EC-reported sensor number'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  platform/chrome: sensorhub: Bound the EC-reported sensor number

  Each EC FIFO event carries an 8-bit sensor number (in->sensor_num).
  cros_ec_sensorhub_ring_handler() va…
severity: high
cvss: 8.4
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-787
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 145d59baff5944b71551ac518d7fd7d377a9c820 <
    3a76b87e1d065183e2e7ae5b800cb1f6e84f543d
  - >-
    Linux >= 145d59baff5944b71551ac518d7fd7d377a9c820 <
    2b602ecf6193ecb9720c78b6728d7e09370b1ff1
  - >-
    Linux >= 145d59baff5944b71551ac518d7fd7d377a9c820 <
    324880f94ba3c6269a607e04f78a4dd4a66b3f53
  - >-
    Linux >= 145d59baff5944b71551ac518d7fd7d377a9c820 <
    d1b4add68dabfdd6481a4fa198bf3b473d2634d7
  - >-
    Linux >= 145d59baff5944b71551ac518d7fd7d377a9c820 <
    3d2636dce0a8fe9eecad29010699847be425dc80
  - >-
    Linux >= 145d59baff5944b71551ac518d7fd7d377a9c820 <
    5eaf7faa99578ae090030d1e2e6ea3b37a615496
  - >-
    Linux >= 145d59baff5944b71551ac518d7fd7d377a9c820 <
    4d9bf63ed74f859c6698bc01d8fb216ef9253867
  - >-
    Linux >= 145d59baff5944b71551ac518d7fd7d377a9c820 <
    833740a2333c2e4db4e02e3d0ffba04e8718a5f3
  - Linux 5.7
published: '2026-09-11'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T08:46:42.592Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-81017'
references:
  - url: 'https://git.kernel.org/stable/c/3a76b87e1d065183e2e7ae5b800cb1f6e84f543d'
  - url: 'https://git.kernel.org/stable/c/2b602ecf6193ecb9720c78b6728d7e09370b1ff1'
  - url: 'https://git.kernel.org/stable/c/324880f94ba3c6269a607e04f78a4dd4a66b3f53'
  - url: 'https://git.kernel.org/stable/c/d1b4add68dabfdd6481a4fa198bf3b473d2634d7'
  - url: 'https://git.kernel.org/stable/c/3d2636dce0a8fe9eecad29010699847be425dc80'
  - url: 'https://git.kernel.org/stable/c/5eaf7faa99578ae090030d1e2e6ea3b37a615496'
  - url: 'https://git.kernel.org/stable/c/4d9bf63ed74f859c6698bc01d8fb216ef9253867'
  - url: 'https://git.kernel.org/stable/c/833740a2333c2e4db4e02e3d0ffba04e8718a5f3'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-81017.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-81017'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532430'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-81017'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-81017'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-81017.mbox
tags:
  - cve.org
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.00185
epssPercentile: 0.08013
scores:
  cna: 8.4
  vendor: 5.5
ingestedAt: '2026-09-14T15:23:07.454Z'
---

## Overview

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

platform/chrome: sensorhub: Bound the EC-reported sensor number

Each EC FIFO event carries an 8-bit sensor number (in->sensor_num).
cros_ec_sensorhub_ring_handler() validates the FIFO event count, the
per-read count and the ring bound, but not the sensor number, which
cros_ec_sensor_ring_process_event() then uses unchecked to index
sensorhub->batch_state[] - allocated with only sensorhub->sensor_num
entries. A sensor number of sensor_num or larger is an out-of-bounds
read and write of batch_state[].

Validate the sensor number in the ring handler, where each event is read
from the EC, and drop a malformed event before it is used.

## Affected

- `Linux >= 145d59baff5944b71551ac518d7fd7d377a9c820 < 3a76b87e1d065183e2e7ae5b800cb1f6e84f543d`
- `Linux >= 145d59baff5944b71551ac518d7fd7d377a9c820 < 2b602ecf6193ecb9720c78b6728d7e09370b1ff1`
- `Linux >= 145d59baff5944b71551ac518d7fd7d377a9c820 < 324880f94ba3c6269a607e04f78a4dd4a66b3f53`
- `Linux >= 145d59baff5944b71551ac518d7fd7d377a9c820 < d1b4add68dabfdd6481a4fa198bf3b473d2634d7`
- `Linux >= 145d59baff5944b71551ac518d7fd7d377a9c820 < 3d2636dce0a8fe9eecad29010699847be425dc80`
- `Linux >= 145d59baff5944b71551ac518d7fd7d377a9c820 < 5eaf7faa99578ae090030d1e2e6ea3b37a615496`
- `Linux >= 145d59baff5944b71551ac518d7fd7d377a9c820 < 4d9bf63ed74f859c6698bc01d8fb216ef9253867`
- `Linux >= 145d59baff5944b71551ac518d7fd7d377a9c820 < 833740a2333c2e4db4e02e3d0ffba04e8718a5f3`
- `Linux 5.7`

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-81017.json)