A three-day training on fuzzing, a powerful technique for identifying vulnerabilities in software. This hands-on training will cover the theory and practical aspects of fuzzing, including coverage-guided fuzzing, basic blocks and binary instrumentation, corpus collection and minimization, target selection, crash triage and root cause analysis, and real-life CVE analysis. Attendees will have the opportunity to practice fuzzing on open source software and apply the concepts and techniques learned in the training. This training is suitable for attendees with a basic understanding of software development and testing. In this training, attendees will learn about the different types of vulnerabilities that can be found through fuzzing, including buffer overflows, heap overflows, integer overflows, use-after-free errors, and out-of-bounds read/write errors. We will discuss the underlying causes and potential impacts of these vulnerabilities, as well as how to identify and address them through fuzzing.In addition to coverage-guided fuzzing, we will also introduce other types of fuzzer, such as dumb fuzzers and mutation fuzzers, and discuss their benefits and limitations. Attendees will also learn how to use tools such as GDB and Crashwalk to debug and analyze crashes, and to perform root cause analysis to identify the underlying cause of vulnerabilities.