Expat is a C library for parsing XML documents. Security Fix: * expat: large number of colons in input makes parser consume high amount of resources, leading to DoS * expat: heap-based buffer over-read via crafted XML input For more details about the security issue, including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page listed in the References section. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.9 Release Notes linked from the References section.