As seen in most security blog posts today, binary diffing tools are essential for reverse engineering, vulnerability research, and malware analysis. Patch diffing is a technique widely used to identify changes across versions of binaries as related to security patches. By diffing two binaries, a security researcher can dig deeper into the latest CVEs and patched vulnerabilities to understand their root cause. This talk presents Ghidriff, a new open-source Python package that offers a command line binary diffing capability leveraging the power of the Ghidra Software Reverse Engineering (SRE) Framework with a fresh take on the standard patch diffing workflow. We will dive into the internals of modern patch diffing, learn the basics of function matching, discover practical uses of diffing for reverse engineering and vulnerability research, and discover together the root cause of several recently patched Windows CVEs by leveraging Ghidriff's simple workflow.Like other binary diffing solutions, Ghidriff relies on SRE tooling to distill complex binaries into objects and relationships that can be compared. Unlike other tools, Ghidriff offers a command line experience, simplifying the entire patch diffing workflow to only a single step, significantly reducing analysis time. Additionally, the results of the diff are rendered as concise markdown files that can be shared on GitHub, GitLab, blogs, or almost anywhere. Ghidriff is the open-source tool security researchers need to quickly understand the latest patched vulnerabilities and easily share their next vulnerability writeup with the security community.