The libpng packages contain a library of functions for creating and manipulating Portable Network Graphics image format files. Security Fix: * libpng: does not check length of chunks against user limit 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.