PAX Technology PAX A920 Pro PayDroid 8.1suffers from a Race Condition vulnerability, which allows attackers to bypass the payment software and force the OS to boot directly to Android during the boot process. NOTE: the vendor disputes this because the attack is not feasible: the home launcher will be loaded before any user applications.
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.