Setting up Linux Kernel in Local
Kernel Lab Setup Checklist CVE-2026-31431 (Copy Fail) — Debug Environment This checklist covers everything needed to go from zero to a running kernel inside QEMU with GDB attached and a breakpoint set in the vulnerable function. Follow in order — each step depends on the previous one. Theory: What We’re Building and Why Your Ubuntu laptop ├── QEMU ← virtual machine running your custom kernel │ └── bzImage ← the compiled kernel (compressed, no debug symbols) └── GDB ← debugger attached to QEMU via TCP port 1234 └── vmlinux ← same kernel with full debug symbols (used by GDB only) Why two kernel files? ...