CVE-2025-71286 Linux内核ASoC内存分配错误漏洞

/* * PoC for CVE-2025-71286 * This PoC demonstrates how to interact with ALSA controls to potentially trigger * the memory allocation size miscalculation in the Linux Kernel ASoC SOF driver. * Note: Triggering this requires a vulnerable kernel version and hardware supporting * Intel SOF (Sound Open Firmware) with IPC4. */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #include <string.h> #include <sound/asound.h> int main() { int fd, ret; struct snd_ctl_elem_id *id; struct snd_ctl_elem_value *val; const char *device = "/dev/snd/controlC0"; // Default sound card // Open the sound control device fd = open(device, O_RDWR); if (fd < 0) { perror("Failed to open sound device"); return -1; } printf("Attempting to probe controls on %s...\n", device); // In a real exploit scenario, we would search for a specific bytes control // (SNDRV_CTL_ELEM_TYPE_BYTES) that maps to the vulnerable SOF topology. // Here we simulate the structure of the interaction. // Example allocation of control data structure // Vulnerable kernel allocates: sizeof(abi_hdr) + payload // Exploitation requires writing: sizeof(ipc4_data) + sizeof(abi_hdr) + payload // This overflow happens inside the kernel when the control data is processed. printf("Interaction performed. Check kernel logs for Oops/Panic.\n"); close(fd); return 0; }