# CVE-2026-81017

## Summary

- **CVE ID:** CVE-2026-81017
- **Severity:** HIGH
- **CVSS Score:** 8.4 (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** N/A
- **Published:** Sep 11, 2026
- **Last Modified:** Sep 14, 2026

## Description

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 Products

- Linux — Linux (145d59baff5944b71551ac518d7fd7d377a9c820)
- Linux — Linux (5.7)
- Linux — Linux (0)
- Linux — Linux (6.12.109)
- Linux — Linux (6.18.50)
- Linux — Linux (7.2.4)
- Linux — Linux (7.3-rc1)
- Linux — Linux (5.10.270)
- Linux — Linux (5.15.221)
- Linux — Linux (6.1.188)
- Linux — Linux (6.6.157)

## References

- [CNA](https://git.kernel.org/stable/c/3d2636dce0a8fe9eecad29010699847be425dc80)
- [CNA](https://git.kernel.org/stable/c/5eaf7faa99578ae090030d1e2e6ea3b37a615496)
- [CNA](https://git.kernel.org/stable/c/4d9bf63ed74f859c6698bc01d8fb216ef9253867)
- [CNA](https://git.kernel.org/stable/c/833740a2333c2e4db4e02e3d0ffba04e8718a5f3)
- [CNA](https://git.kernel.org/stable/c/3a76b87e1d065183e2e7ae5b800cb1f6e84f543d)
- [CNA](https://git.kernel.org/stable/c/2b602ecf6193ecb9720c78b6728d7e09370b1ff1)
- [CNA](https://git.kernel.org/stable/c/324880f94ba3c6269a607e04f78a4dd4a66b3f53)
- [CNA](https://git.kernel.org/stable/c/d1b4add68dabfdd6481a4fa198bf3b473d2634d7)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.18%
- **EPSS Percentile:** 8.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._