An issue was discovered in PHP before 5.6.40, 7.x before 7.1.26, 7.2.x before 7.2.14, and 7.3.x before 7.3.1. Invalid input to the function xmlrpc_decode() can lead to an invalid memory access (heap out of bounds read or read after free). This is related to xml_elem_parse_buf in ext/xmlrpc/libxmlrpc/xml_element.c.
https://www.debian.org/security/2019/dsa-4398
https://usn.ubuntu.com/3902-2/
https://usn.ubuntu.com/3902-1/
https://security.netapp.com/advisory/ntap-20190321-0001/
https://bugs.php.net/bug.php?id=77249
https://bugs.php.net/bug.php?id=77242
https://access.redhat.com/errata/RHSA-2019:3299
https://access.redhat.com/errata/RHSA-2019:2519
http://www.securityfocus.com/bid/107156
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00044.html
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00041.html
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00104.html
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00083.html