static void SVGAttributeDeclaration(void *context,const xmlChar *element,
  const xmlChar *name,int type,int value,const xmlChar *default_value,
  xmlEnumerationPtr tree)
{
  SVGInfo
    *svg_info;

  xmlChar
    *fullname,
    *prefix;

  xmlParserCtxtPtr
    parser;

  /*
    An attribute definition has been parsed.
  */
  (void) LogMagickEvent(CoderEvent,GetMagickModule(),
    "  SAX.attributeDecl(%s, %s, %d, %d, %s, ...)",element,name,type,value,
    default_value);
  svg_info=(SVGInfo *) context;
  fullname=(xmlChar *) NULL;
  prefix=(xmlChar *) NULL;
  parser=svg_info->parser;
  fullname=(xmlChar *) xmlSplitQName(parser,name,&prefix);
  if (parser->inSubset == 1)
    (void) xmlAddAttributeDecl(&parser->vctxt,svg_info->document->intSubset,
      element,fullname,prefix,(xmlAttributeType) type,
      (xmlAttributeDefault) value,default_value,tree);
  else
    if (parser->inSubset == 2)
      (void) xmlAddAttributeDecl(&parser->vctxt,svg_info->document->extSubset,
        element,fullname,prefix,(xmlAttributeType) type,
        (xmlAttributeDefault) value,default_value,tree);
  if (prefix != (xmlChar *) NULL)
    xmlFree(prefix);
  if (fullname != (xmlChar *) NULL)
    xmlFree(fullname);
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.