In libexpat through 2.4.9, there is a use-after free caused by overeager destruction of a shared DTD in XML_ExternalEntityParserCreate in out-of-memory situations.
修复方式
yum update PackageName
是否受影响判断
判断方法：yum info PackageName 结果说明：版本小于修复版本，则受此漏洞影响，版本大于等于修复版本，则此漏洞已修复。