This update for libxml2 fixes the following security issues: - CVE-2018-9251: The xz_decomp function allowed remote attackers to cause a denial of service via a crafted XML file that triggers LZMA_MEMLIMIT_ERROR, as demonstrated by xmllint - CVE-2018-14567: Prevent denial of service via a crafted XML file that triggers LZMA_MEMLIMIT_ERROR, as demonstrated by xmllint - CVE-2018-14404: Prevent NULL pointer dereference in the xmlXPathCompOpEval function when parsing an invalid XPath expression in the XPATH_OP_AND or XPATH_OP_OR case leading to a denial of service attack