NetSight
IP …
medium5.5

CVE-2021-46906

In the Linux kernel, the following vulnerability has been resolved: HID: usbhid: fix info leak in hid_submit_ctrl In hid_submit_ctrl(), the way of calculating …

Impact

In the Linux kernel, the following vulnerability has been resolved: HID: usbhid: fix info leak in hid_submit_ctrl In hid_submit_ctrl(), the way of calculating the report length doesn't take into account that report->size can be zero. When running the syzkaller reproducer, a report of size 0 causes hid_submit_ctrl) to calculate transfer_buffer_length as 16384. When this urb is passed to the usb core layer, KMSAN reports an info leak of 16384 bytes. To fix this, first modify hid_report_len() to account for the zero report size case by using DIV_ROUND_UP for the division. Then, call it from hid_submit_ctrl().

Affected products

VendorProductAffected versions
LinuxLinux Kernel
before 4.4.274
from 4.5.0 before 4.9.274
from 4.10.0 before 4.14.238
from 4.15.0 before 4.19.196
from 4.20.0 before 5.4.127
from 5.5.0 before 5.10.45

Weakness classification

CWE-668

References