This update for libxml2 fixes several issues. Theses security issues were fixed: - CVE-2017-16932: Fixed infinite recursion could lead to an infinite loop or memory exhaustion when expanding a parameter entity in a DTD . - CVE-2017-15412: Prevent use after free when calling XPath extension functions that allowed remote attackers to cause DoS or potentially RCE - CVE-2016-5131: Use-after-free vulnerability in libxml2 allowed remote attackers to cause a denial of service or possibly have unspecified other impact via vectors related to the XPointer range-to function. - CVE-2017-5130: Fixed a potential remote buffer overflow in function xmlMemoryStrdup