static MagickBooleanType ReadDXT5(Image *image, DDSInfo *dds_info,
  ExceptionInfo *exception)
{
  DDSColors
    colors;

  ssize_t
    j,
    y;

  MagickSizeType
    alpha_bits;

  PixelPacket
    *q;

  register ssize_t
    i,
    x;

  unsigned char
    a0,
    a1;

  size_t
    alpha,
    bits,
    code,
    alpha_code;

  unsigned short
    c0,
    c1;

  for (y = 0; y < (ssize_t) dds_info->height; y += 4)
  {
    for (x = 0; x < (ssize_t) dds_info->width; x += 4)
    {
      /* Get 4x4 patch of pixels to write on */
      q = QueueAuthenticPixels(image, x, y, MagickMin(4, dds_info->width - x),
                         MagickMin(4, dds_info->height - y),exception);

      if (q == (PixelPacket *) NULL)
        return MagickFalse;

      /* Read alpha values (8 bytes) */
      a0 = (unsigned char) ReadBlobByte(image);
      a1 = (unsigned char) ReadBlobByte(image);

      alpha_bits = (MagickSizeType)ReadBlobLSBLong(image);
      alpha_bits = alpha_bits | ((MagickSizeType)ReadBlobLSBShort(image) << 32);

      /* Read 8 bytes of data from the image */
      c0 = ReadBlobLSBShort(image);
      c1 = ReadBlobLSBShort(image);
      bits = ReadBlobLSBLong(image);

      CalculateColors(c0, c1, &colors, MagickTrue);

      /* Write the pixels */
      for (j = 0; j < 4; j++)
      {
        for (i = 0; i < 4; i++)
        {
          if ((x + i) < (ssize_t) dds_info->width && (y + j) < (ssize_t) dds_info->height)
            {
              code = (bits >> ((4*j+i)*2)) & 0x3;
              SetPixelRed(q,ScaleCharToQuantum(colors.r[code]));
              SetPixelGreen(q,ScaleCharToQuantum(colors.g[code]));
              SetPixelBlue(q,ScaleCharToQuantum(colors.b[code]));
              /* Extract alpha value */
              alpha_code = (size_t) (alpha_bits >> (3*(4*j+i))) & 0x7;
              if (alpha_code == 0)
                alpha = a0;
              else if (alpha_code == 1)
                alpha = a1;
              else if (a0 > a1)
                alpha = ((8-alpha_code) * a0 + (alpha_code-1) * a1) / 7;
              else if (alpha_code == 6)
                alpha = 0;
              else if (alpha_code == 7)
                alpha = 255;
              else
                alpha = (((6-alpha_code) * a0 + (alpha_code-1) * a1) / 5);
              SetPixelAlpha(q,ScaleCharToQuantum((unsigned char)
                alpha));
              q++;
            }
        }
      }

      if (SyncAuthenticPixels(image,exception) == MagickFalse)
        return MagickFalse;
    }
  }

  return(SkipDXTMipmaps(image,dds_info,16,exception));
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.