Software and Technology Product Liability — When Digital Defects Cause Physical Harm

## Product Liability in the Age of Software-Driven Products

Software is increasingly embedded in products that can cause serious physical harm when they fail — medical devices, vehicles, industrial control systems, consumer electronics, and infrastructure. When software defects cause physical injury, product liability law provides a path to compensation, but applying doctrines developed for physical goods to intangible software creates legal questions that courts are actively resolving.

Boeing's MCAS software failure, implicated in two crashes that killed 346 people, resulted in over $2.5 billion in criminal settlements and generated product liability claims from hundreds of victim families — establishing that defective software controlling physical systems creates the same liability as hardware defects.

How Product Liability Applies to Software

Traditional product liability doctrine was developed around physical objects, but courts have increasingly applied it to software embedded in physical products — particularly when the software controls the product's physical operation.

**Software as product:** Courts in most jurisdictions treat embedded software (in medical devices, vehicles, appliances) as a component of the physical product, subject to product liability in the same way as hardware components
**Software as service:** Standalone software applications or cloud-based services are more frequently treated as services rather than products, potentially limiting strict liability application — though negligence claims remain available
**Over-the-air updates:** Software changes delivered after purchase can introduce new defects into previously safe products — creating liability for the manufacturer even years after original sale

Proving Software Defect in a Product Liability Case

**Source code analysis:** Expert software engineers analyze the code to identify the specific defect — an error in algorithm logic, inadequate error handling, or a failure condition the code does not address
**Simulation and testing:** Replicating the conditions under which the software failed can demonstrate both the defect and its foreseeability
**Internal development documents:** Tickets, bug reports, and testing logs from the manufacturer's development process often reveal that the defect was known before product release
**Update and patch history:** Software changes made after the injury often acknowledge the defect obliquely through "bug fix" and "stability improvement" descriptions

Software product liability is a rapidly developing area of law. An attorney handling these cases must combine traditional product liability expertise with sufficient technical knowledge to work effectively with software engineering experts and understand the evidence that distinguishes defects from user error.