The xsltStylePreCompute function in preproc.c in libxslt 1.1.28 does not check if the parent node is an element, which allows attackers to cause a denial of service via a crafted XML file, related to a type confusion issue.<a href=http://cwe.mitre.org/data/definitions/843.html>CWE-843: Access of Resource Using Incompatible Type ('Type Confusion')</a> http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-7995