CVE-2026-34002 X.Org X Server XKB越界读取漏洞

/* * Conceptual PoC for CVE-2026-34002 * Triggering Out-of-Bounds Read in X.Org XKB handling */ #include <X11/Xlib.h> #include <X11/XKBlib.h> #include <stdio.h> #include <stdlib.h> #include <string.h> int main() { Display *dpy = XOpenDisplay(NULL); if (!dpy) { fprintf(stderr, "Cannot open display\n"); return 1; } // Note: Actual exploitation requires crafting specific XKB protocol bytes. // This demonstrates the context of sending a request to the server. // The vulnerability is triggered by malformed modifier map requests. printf("Attempting to connect and trigger XKB vulnerability...\n"); // Malicious payload would be injected here via XKBSetMap or similar requests // with invalid lengths pointing to the modifier map. XCloseDisplay(dpy); return 0; }