CVE-2026-43243: Linux内核AMD显卡驱动崩溃漏洞

/* * PoC for CVE-2026-43243 (Conceptual) * This code demonstrates how to interact with the DRM device * to potentially trigger the missing signal type check. */ #include <fcntl.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <sys/ioctl.h> // Standard DRM ioctl definitions would be included here // For demonstration purposes, we assume the existence of relevant structures #define DRM_IOCTL_MODE_ATOMIC 0xc0 int main(int argc, char **argv) { int fd; const char *device = "/dev/dri/card0"; // Open the DRM device fd = open(device, O_RDWR); if (fd < 0) { perror("Failed to open device"); return EXIT_FAILURE; } printf("Attempting to trigger vulnerability in dcn401_get_phyd32clk_src...\n"); /* * In a real exploit scenario, specific atomic mode-setting requests * would be crafted to force the driver into the DPIA link path * without proper signal type checking. */ // Placeholder for the actual IOCTL call that triggers the bug // ioctl(fd, DRM_IOCTL_MODE_ATOMIC, ...); close(fd); printf("PoC execution finished.\n"); return EXIT_SUCCESS; }