CVE-2026-43503 DirtyClone exploit compilation and execution in temp dirs

Detects a two-stage activity pattern where a non-root user compiles C source code using common compilers (gcc, clang) within writable system directories (/tmp, /dev/shm, /var/tmp) using command-line arguments indicative of kernel or low-level exploits (e.g., skbuff, xfrm, static compilation), followed by the immediate execution of a newly created binary from those same directories within 60 seconds.