ASLR (Address Space Layout Randomization) is a cybersecurity technique that randomly arranges the memory addresses used by system and application processes. By changing where code and data are loaded in memory each time a program runs, ASLR makes it much harder for attackers to predict the location of specific functions or data needed to exploit vulnerabilities. This unpredictability helps prevent certain types of attacks, such as buffer overflows, by reducing the chances that malicious code can reliably target and compromise a system.