CVE-2026-81017

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

State: Published
Severity: 8.4 High
Published: Sep 11, 2026
Updated: Oct 19, 2026
Reserved: Aug 26, 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.

Scores

CVSS	Score	Vector	Source
3.1	8.4 High	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	145d59baff5944b71551ac518d7fd7d377a9c820 to before 3a76b87e1d065183e2e7ae5b800cb1f6e84f543dAffected 145d59baff5944b71551ac518d7fd7d377a9c820 to before 2b602ecf6193ecb9720c78b6728d7e09370b1ff1Affected 145d59baff5944b71551ac518d7fd7d377a9c820 to before 324880f94ba3c6269a607e04f78a4dd4a66b3f53Affected 145d59baff5944b71551ac518d7fd7d377a9c820 to before d1b4add68dabfdd6481a4fa198bf3b473d2634d7Affected 145d59baff5944b71551ac518d7fd7d377a9c820 to before 3d2636dce0a8fe9eecad29010699847be425dc80Affected 145d59baff5944b71551ac518d7fd7d377a9c820 to before 5eaf7faa99578ae090030d1e2e6ea3b37a615496Affected 145d59baff5944b71551ac518d7fd7d377a9c820 to before 4d9bf63ed74f859c6698bc01d8fb216ef9253867Affected 145d59baff5944b71551ac518d7fd7d377a9c820 to before 833740a2333c2e4db4e02e3d0ffba04e8718a5f3Affected
LinuxLinux	5.7Affected before 5.7Not affected 5.10.270 through 5.10.Not affected 5.15.221 through 5.15.Not affected 6.1.188 through 6.1.Not affected 6.6.157 through 6.6.Not affected 6.12.109 through 6.12.Not affected 6.18.50 through 6.18.Not affected 7.2.4 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

145d59baff5944b71551ac518d7fd7d377a9c820 to before 3a76b87e1d065183e2e7ae5b800cb1f6e84f543dAffected
145d59baff5944b71551ac518d7fd7d377a9c820 to before 2b602ecf6193ecb9720c78b6728d7e09370b1ff1Affected
145d59baff5944b71551ac518d7fd7d377a9c820 to before 324880f94ba3c6269a607e04f78a4dd4a66b3f53Affected
145d59baff5944b71551ac518d7fd7d377a9c820 to before d1b4add68dabfdd6481a4fa198bf3b473d2634d7Affected
145d59baff5944b71551ac518d7fd7d377a9c820 to before 3d2636dce0a8fe9eecad29010699847be425dc80Affected
145d59baff5944b71551ac518d7fd7d377a9c820 to before 5eaf7faa99578ae090030d1e2e6ea3b37a615496Affected
145d59baff5944b71551ac518d7fd7d377a9c820 to before 4d9bf63ed74f859c6698bc01d8fb216ef9253867Affected
145d59baff5944b71551ac518d7fd7d377a9c820 to before 833740a2333c2e4db4e02e3d0ffba04e8718a5f3Affected

LinuxLinux

5.7Affected
before 5.7Not affected
5.10.270 through 5.10.*Not affected
5.15.221 through 5.15.*Not affected
6.1.188 through 6.1.*Not affected
6.6.157 through 6.6.*Not affected
6.12.109 through 6.12.*Not affected
6.18.50 through 6.18.*Not affected
7.2.4 through 7.2.*Not affected
7.3 and laterNot affected

References

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