CVE-2026-31749 Linux内核ni_atmio16d驱动空指针引用漏洞

/* * PoC Concept for CVE-2026-31749 * Triggering the null pointer dereference in ni_atmio16d driver. * This requires a system with the vulnerable kernel module loaded. */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #define DEVICE_FILE "/dev/comedi0" int main() { int fd; printf("[*] Attempting to trigger vulnerability in ni_atmio16d...\n"); // Open the comedi device. If the attach fails during initialization // (e.g. due to missing hardware or manual trigger), // the detach logic will be called. fd = open(DEVICE_FILE, O_RDWR); if (fd < 0) { perror("[-] Failed to open device"); // In a real scenario, specific hardware emulation or forcing // the module to attach and fail is needed to reproduce the crash. return 1; } printf("[+] Device opened. Manipulating device to force failed attach state...\n"); // Specific IOCTLs or configuration steps that cause the driver // to enter the error handling path in atmio16d_attach // would go here. Once triggered, the kernel will panic // due to NULL pointer dereference in atmio16d_detach. close(fd); return 0; }