This update for libxml2 fixes the following security issues:
CVE-2018-9251: The xzdecomp function allowed remote attackers to cause a
denial of service (infinite loop) via a crafted XML file that triggers
LZMAMEMLIMIT_ERROR, as demonstrated by xmllint (bsc#1088279)
CVE-2018-14567: Prevent denial of service (infinite loop) via a crafted XML
file that triggers LZMAMEMLIMITERROR, as demonstrated by xmllint
(bsc#1105166)
CVE-2018-14404: Prevent NULL pointer dereference in the xmlXPathCompOpEval()
function when parsing an invalid XPath expression in the XPATHOPAND or
XPATHOPOR case leading to a denial of service attack (bsc#1102046)