A driver regression is a change in device-driver behavior that introduces new bugs, instability, or performance loss. Drivers run close to the operating system and hardware, so even a small code or configuration change can affect boot time, latency, power use, crashes, or feature availability.
In cyber security, driver regressions matter because they can look like malware, sabotage, or a failing endpoint control when the real problem is a faulty update. Defenders need driver awareness, version tracking, and staged deployment to spot regressions quickly and limit blast radius. In attacks, adversaries may also benefit from these failures indirectly: unstable drivers can weaken monitoring, break security tooling, or force rushed rollbacks that expose systems to other risks. Good incident response separates genuine compromise from operational breakage at the driver layer.