CVE:CVE-2017-18926
CNNVD:CNNVD-202011-655
Raptor是一个免费软件/开源C库，提供了一组解析器和序列化器，这些解析器和序列化器通过解析语法或将三元组序列化为语法来生成资源描述框架（RDF）三元组。
Raptor RDF Syntax Library 2.0.15 版本存在安全漏洞，该漏洞源于raptor_xml_writer.c中raptor_xml_writer_start_element_common会错误地计算xml写入器的最大nspace声明，导致基于堆的缓冲区溢出。
solution:Upgrade librdf raptor_rdf_syntax_library to a higher version than 2.0.15,and avoid the version 2.0.15; Upgrade debian debian_linux to a higher version than 9.0,10.0,and avoid the version 9.0,10.0; Upgrade fedoraproject fedora to a higher version than 31,32,33,and avoid the version 31,32,33