Cardiac Arrest Survival Act of 2023 This bill expands immunity from civil liability related to emergency use of automated external defibrillator devices (AEDs). In particular, the bill specifies that immunity applies regardless of whether the person who used the AED complied with signage, received training, or was assisted or supervised by another person, such as a licensed physician. Additionally, the bill limits the liability of the person who owns or acquires an AED for harm resulting from its use unless that person fails to appropriately maintain the AED.