CVE-2025-71138: Linux内核drm/msm/dpu驱动空指针解引用漏洞

// PoC concept for CVE-2025-71138 // This demonstrates triggering the NULL pointer dereference in dpu_encoder_phys_wb_setup_ctl // Note: Actual exploitation requires specific hardware and display configuration #include <stdio.h> #include <stdlib.h> #include <fcntl.h> /* * Trigger conditions for CVE-2025-71138: * 1. Target system with MSM DRM driver * 2. Configure display pipeline for writeback mode * 3. Create conditions where pingpong interface is NULL * 4. Trigger dpu_encoder_phys_wb_setup_ctl() with NULL pingpong * * This is a kernel vulnerability - exploitation requires: * - Local access to the system * - Ability to interact with DRM subsystem * - Specific display hardware configuration */ int main() { printf("CVE-2025-71138 PoC Concept\n"); printf("Target: Linux kernel drm/msm/dpu driver\n"); printf("Vulnerability: Missing NULL pointer check in dpu_encoder_phys_wb_setup_ctl\n"); printf("\nNote: This is a conceptual demonstration.\n"); printf("Actual exploitation requires:\n"); printf(" - Kernel module with vulnerable dpu driver\n"); printf(" - Specific display hardware (typically Qualcomm SoC)\n"); printf(" - Custom kernel module or ioctl to trigger the condition\n"); return 0; }