CVE-2025-21756: Attack of the Vsock What started off as casual scrolling through the KernelCTF submissions quickly spiraled into a weeks-long deep dive into a deceptively simple patch - and my first root shell from a Linux kernel exploit! While browsing the public spreadsheet of submissions, I saw an interesting entry: exp237. The bug patch seemed incredibly simple, and I was amazed that a researcher was able to leverage the issue for privilege escalation. So I set off on a journey that would lo...