CVE-2026-23416: Linux内核mm/mseal VMA合并漏洞

#include <sys/mman.h> #include <unistd.h> // Conceptual PoC for CVE-2026-23416 // This attempts to trigger the VMA merge bug in mm/mseal. int main() { void *ptr; // Step 1: Create a memory mapping ptr = mmap(NULL, 4096, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); if (ptr == MAP_FAILED) return 1; // Step 2: Seal the VMA (requires mseal syscall) // mseal(ptr, 4096, MSEAL_PROT_PKEY); // Step 3: Perform operations that might trigger a merge // e.g., mprotect or munmap adjacent regions while iterating // This logic is highly dependent on internal kernel state. return 0; }