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.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
References 8
https://git.kernel.org/stable/c/3d2636dce0a8fe9eecad29010699847be425dc80
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/4d9bf63ed74f859c6698bc01d8fb216ef9253867
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/5eaf7faa99578ae090030d1e2e6ea3b37a615496
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/833740a2333c2e4db4e02e3d0ffba04e8718a5f3
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/2b602ecf6193ecb9720c78b6728d7e09370b1ff1
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/324880f94ba3c6269a607e04f78a4dd4a66b3f53
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/3a76b87e1d065183e2e7ae5b800cb1f6e84f543d
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/d1b4add68dabfdd6481a4fa198bf3b473d2634d7
416baaa9-dc9f-4396-8d5f-8c081fb06d67