Linux vulnerability

What happened

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 versions

Linux: 145d59baff5944b71551ac518d7fd7d377a9c820 through before 3d2636dce0a8fe9eecad29010699847be425dc80 (git); 145d59baff5944b71551ac518d7fd7d377a9c820 through before 5eaf7faa99578ae090030d1e2e6ea3b37a615496 (git); 145d59baff5944b71551ac518d7fd7d377a9c820 through before 4d9bf63ed74f859c6698bc01d8fb216ef9253867 (git); 145d59baff5944b71551ac518d7fd7d377a9c820 through before 833740a2333c2e4db4e02e3d0ffba04e8718a5f3 (git); 5.7 Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

• Apply vendor-provided updates or mitigations.
• Review affected product exposure and access logs.