From the description on MITRE's CVE page: TinyXML through 2.6.2 has an infinite loop in TiXmlParsingData::Stamp in tinyxmlparser.cpp via the TIXML_UTF_LEAD_0 case. It can be triggered by a crafted XML message and leads to a denial of service.
Created tinyxml tracking bugs for this issue: Affects: epel-all [bug 2253717] Affects: fedora-all [bug 2253718]