CVE-2026-81017

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux145d59baff5944b71551ac518d7fd7d377a9c820 < 3d2636dce0a8fe9eecad29010699847be425dc80affected
LinuxLinux145d59baff5944b71551ac518d7fd7d377a9c820 < 5eaf7faa99578ae090030d1e2e6ea3b37a615496affected
LinuxLinux145d59baff5944b71551ac518d7fd7d377a9c820 < 4d9bf63ed74f859c6698bc01d8fb216ef9253867affected
LinuxLinux145d59baff5944b71551ac518d7fd7d377a9c820 < 833740a2333c2e4db4e02e3d0ffba04e8718a5f3affected
LinuxLinux5.7affected
LinuxLinux0 < 5.7unaffected
LinuxLinux6.12.109 <= 6.12.*unaffected
LinuxLinux6.18.50 <= 6.18.*unaffected
LinuxLinux7.2.4 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References