This update for libxml2 fixes three security issues:

- CVE-2017-15412: Prevent use after free when calling XPath extension functions
that allowed remote attackers to cause DoS or potentially RCE (bsc#1077993)
- 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. (bsc#1078813)
- CVE-2017-5130: Fixed a potential remote buffer overflow in function
xmlMemoryStrdup() (bsc#1078806)

This update was imported from the SUSE:SLE-12-SP2:Update update project.