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CVE-2026-81017

HIGHCVSS 8.4/10EPSS 0.18%

Last modified

CVE-2026-81017 is a high-severity vulnerability rated 8.4/10 on the CVSS scale. 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.. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
8.4/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.18%

8.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 145d59baff5944b71551ac518d7fd7d377a9c820, < 3a76b87e1d065183e2e7ae5b800cb1f6e84f543d; >= 145d59baff5944b71551ac518d7fd7d377a9c820, < 2b602ecf6193ecb9720c78b6728d7e09370b1ff1; >= 145d59baff5944b71551ac518d7fd7d377a9c820, < 324880f94ba3c6269a607e04f78a4dd4a66b3f53; >= 145d59baff5944b71551ac518d7fd7d377a9c820, < d1b4add68dabfdd6481a4fa198bf3b473d2634d7; >= 145d59baff5944b71551ac518d7fd7d377a9c820, < 3d2636dce0a8fe9eecad29010699847be425dc80; >= 145d59baff5944b71551ac518d7fd7d377a9c820, < 5eaf7faa99578ae090030d1e2e6ea3b37a615496; >= 145d59baff5944b71551ac518d7fd7d377a9c820, < 4d9bf63ed74f859c6698bc01d8fb216ef9253867; >= 145d59baff5944b71551ac518d7fd7d377a9c820, < 833740a2333c2e4db4e02e3d0ffba04e8718a5f3
LinuxLinux5.7

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-81017?
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.
How severe is CVE-2026-81017?
CVE-2026-81017 has a CVSS score of 8.4/10 (HIGH severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.
How do I fix CVE-2026-81017?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST