CVE-2026-43444: Linux内核amdkfd资源释放漏洞

/* * PoC Concept for CVE-2026-43444 * This code demonstrates the logic flaw conceptually. * Exploitation requires access to /dev/kfd and triggering specific ioctls. */ #include <stdio.h> #include <fcntl.h> #include <unistd.h> #define DEVICE_PATH "/dev/kfd" int main() { int fd = open(DEVICE_PATH, O_RDWR); if (fd < 0) { perror("Failed to open device"); return 1; } printf("[+] Opened %s\n", DEVICE_PATH); // In a real exploit scenario: // 1. Create a queue and allocate a buffer object (BO). // 2. Call the update queue ioctl with parameters designed to fail // (e.g., invalid size or permissions). // 3. The kernel enters the error path but forgets to unreserve the BO. printf("[+] Triggering queue update failure...\n"); // ioctl(fd, AMDKFD_IOC_UPDATE_QUEUE, &update_args); printf("[+] If vulnerable, the BO is now leaked/locked.\n"); close(fd); return 0; }