CVE-2026-43668 Apple多平台内核释放后使用漏洞

#include <stdio.h> #include <stdlib.h> // Simulated kernel object structure typedef struct { int id; void (*operation)(void); } KernelObject; void safe_operation() { printf("Kernel operation executed safely.\n"); } void malicious_operation() { printf("Exploit triggered! Kernel memory corrupted.\n"); } /* * PoC Concept for CVE-2026-43668 (UAF in Kernel) * This simulates the logic of using a pointer after it has been freed. */ void simulate_uaf_vulnerability() { // Allocate kernel object KernelObject *k_obj = (KernelObject *)malloc(sizeof(KernelObject)); k_obj->id = 1; k_obj->operation = safe_operation; printf("[1] Allocated object at: %p\n", (void*)k_obj); // Normal usage k_obj->operation(); // Free the object (Vulnerability context: Kernel frees object) free(k_obj); printf("[2] Object freed.\n"); // Simulate attacker reallocating the memory (Heap Feng Shui) KernelObject *fake_obj = (KernelObject *)malloc(sizeof(KernelObject)); fake_obj->operation = malicious_operation; printf("[3] Attacker reallocated memory at: %p\n", (void*)fake_obj); // Use After Free: Kernel tries to use the old pointer k_obj // In this specific scenario, if allocation reuse happens, it points to fake_obj k_obj->operation(); } int main() { simulate_uaf_vulnerability(); return 0; }