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.
Published: 2026-09-11
Score: 8.4 High
EPSS: < 1% Very Low
KEV: No
Impact: Kernel memory corruption
Action: Apply Patch
AI Analysis

Impact

The Linux kernel sensorhub driver fails to validate the sensor number provided by EC FIFO events before indexing an array, allowing an out‑of‑bounds read/write of the batch_state array. The memory corruption could compromise kernel integrity, potentially enabling privilege The flaw lies in the ring handler that processes sensor events, which runs at kernel privilege.

Affected Systems

The vulnerability affects the Linux kernel’s sensorhub component on all kernel releases that include the sensorhub driver without the sensor‑number validation patch. No specific version information is provided in the CVE description.

Risk and Exploitability

This is a classic out‑of‑bounds error (CWE‑787). The EPSS score indicates a 0.002 probability of exploitation, which translates to less than 1% but is not zero. The vulnerability is not listed in the CISA KEV catalog. While the severity is moderate because it occurs in kernel mode, exploiting it requires local or remote access that allows influencing the EC firmware to generate malformed sensor numbers.

Generated by OpenCVE AI on September 12, 2026 at 20:18 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Update the Linux kernel to a version that includes the sensor‑number validation patch for the sensorhub driver.
  • If a patch cannot be applied immediately, disable the sensorhub driver or restrict access to EC FIFO events to prevent malformed events from reaching the kernel.
  • Ensure the EC firmware and sensor hub software are updated so that they do not generate sensor numbers that exceed the allowed range.

Generated by OpenCVE AI on September 12, 2026 at 20:18 UTC.

Tracking

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Advisories

No advisories yet.

History

Sun, 13 Sep 2026 06:45:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.6, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H'}

cvssV3_1

{'score': 8.4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}


Sat, 12 Sep 2026 12:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-787
References
Metrics threat_severity

None

cvssV3_1

{'score': 6.6, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H'}

threat_severity

Moderate


Fri, 11 Sep 2026 23:45:00 +0000

Type Values Removed Values Added
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.
Title platform/chrome: sensorhub: Bound the EC-reported sensor number
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Subscriptions

Linux Linux Kernel
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-09-13T06:29:19.722Z

Reserved: 2026-08-26T14:34:25.813Z

Link: CVE-2026-81017

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-11T20:19:10.680

Modified: 2026-09-13T07:17:08.230

Link: CVE-2026-81017

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-11T19:43:05Z

Links: CVE-2026-81017 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-12T20:30:17Z

Weaknesses