Sensitive Information Uncleared Before Debug/Power State Transition

This vulnerability occurs when a device changes its power mode or enters a debug state but fails to wipe sensitive data that should become inaccessible after the transition.

Devices cycle through various operational states—like active power, low-power, sleep, hibernate, or debug modes—as part of normal function. Each state has different security boundaries controlling what data is accessible. A security flaw arises when the system moves from a more permissive state (where sensitive data is present) to a more restricted one, but neglects to purge that data first. This leaves confidential information, such as encryption keys or user data, lingering in memory or registers where it shouldn't be reachable. For developers, this means sensitive data can leak across state boundaries if not explicitly cleared before a transition. Think of it as forgetting to shred confidential documents before locking them in a safe—the safe is secure, but the contents inside still pose a risk. To prevent this, you must implement explicit cleanup routines that wipe all sensitive information from temporary storage, caches, and buffers immediately before any power-state or debug-state change is finalized.