LineageOS 16.0 and earlier is affected by: Incorrect Access Control. The impact is: The property checked by `adb root` can also be set in a normal adb shell session. The component is: adb shell (patches to fix this are at https://review.lineageos.org/c/LineageOS/android_system_core/+/234800, https://review.lineageos.org/c/LineageOS/android_device_lineage_sepolicy/+/234799). The attack vector is: When adb is enabled, and an attacker has physical access, `adb shell setprop service.adb.root 1` allows restarting adb as root.

The msm_bus_dbg_update_request_write function in drivers/platform/msm/msm_bus/msm_bus_dbg.c in android_kernel_huawei_msm8916 through 2017-06-16 in LineageOS, and possibly other kernels for MSM devices, allows attackers to cause a denial of service (NULL pointer dereference and device crash) via a crafted /sys/kernel/debug/msm-bus-dbg/client-data/update-request write request.