CVE-2025-71086: Linux kernel ROSE协议rose_kill_by_device()数组索引错误漏洞

// PoC concept for CVE-2025-71086 // This is a conceptual PoC demonstrating the vulnerability trigger condition // Note: Actual exploitation requires kernel debugging and specific ROSE socket usage #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/socket.h> #include <net/rose.h> /* * Vulnerability trigger: * The bug is in rose_kill_by_device() where array[cnt] is used instead of array[i] * This causes: * 1. Uninitialized array element access (cnt < ARRAY_SIZE) * 2. Out-of-bounds read (cnt == ARRAY_SIZE) * * Trigger conditions: * - Create multiple ROSE sockets * - Bind them to a device * - Trigger device shutdown/down * - The buggy loop will iterate with wrong index */ int trigger_vulnerability() { int sock_fds[16]; int i; printf("CVE-2025-71086 PoC - ROSE array index bug\n"); printf("This vulnerability requires kernel-level debugging to confirm\n"); /* * The actual trigger requires: * 1. ROSE protocol support in kernel * 2. Creating sockets that bind to ROSE devices * 3. Forcing device state change that triggers rose_kill_by_device() * * Since this is a kernel bug, detection is typically done via: * - Static code analysis * - Kernel debugging * - Syzkaller/fuzzing */ printf("Detection via code analysis:\n"); printf("Look for: array[cnt] should be array[i] in rose_kill_by_device()\n"); return 0; } int main() { return trigger_vulnerability(); }