Kernel memory corruption via unchecked sensor index
Published Sep 11, 2026 · Updated Sep 11, 2026
Out-of-bounds access in the Linux sensorhub driver allows attackers controlling EC FIFO events to read and write kernel memory. cros_ec_sensorhub_ring_handler() accepts an EC-reported sensor number without checking it against sensorhub->sensor_num, and cros_ec_sensor_ring_process_event() uses it to index the shorter batch_state[] array. Exploitation requires control of a malformed ChromeOS EC sensor FIFO event; the resulting access can corrupt kernel state or expose adjacent kernel memory.
Summary
What happened
Out-of-bounds access in the Linux sensorhub driver allows attackers controlling EC FIFO events to read and write kernel memory. cros_ec_sensorhub_ring_handler() accepts an EC-reported sensor number without checking it against sensorhub->sensor_num, and cros_ec_sensor_ring_process_event() uses it to index the shorter batch_state[] array. Exploitation requires control of a malformed ChromeOS EC sensor FIFO event; the resulting access can corrupt kernel state or expose adjacent kernel memory.
The record
- CVE
- CVE-2026-81017
- Published
- Sep 11, 2026
- Updated
- Sep 11, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- Unavailable
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 11, 2026CVE publishedPublication date reported by the CVE source.
- Sep 11, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=145d59baff5944b71551ac518d7fd7d377a9c820 <3d2636dce0a8fe9eecad29010699847be425dc80
- Affected versionversion=145d59baff5944b71551ac518d7fd7d377a9c820 <4d9bf63ed74f859c6698bc01d8fb216ef9253867
- Affected versionversion=145d59baff5944b71551ac518d7fd7d377a9c820 <5eaf7faa99578ae090030d1e2e6ea3b37a615496
- Affected versionversion=145d59baff5944b71551ac518d7fd7d377a9c820 <833740a2333c2e4db4e02e3d0ffba04e8718a5f3
- Affected versionversion=5.7
What conditions does exploitation require?
What is affected?
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Attacks
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Weakness, pattern, technique
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Public exploit references
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Technologies
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