CVE ID:	CVE-2015-6837
Description:	The xsl_ext_function_php function in ext/xsl/xsltprocessor.c in PHP before 5.4.45, 5.5.x before 5.5.29, and 5.6.x before 5.6.13, when libxml2 before 2.9.2 is used, does not consider the possibility of a NULL valuePop return value before proceeding with a free operation during initial error checking, which allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted XML document, a different vulnerability than CVE-2015-6838.
Test IDs:	1.3.6.1.4.1.25623.1.0.850689   1.3.6.1.4.1.25623.1.1.4.2015.1818.1   1.3.6.1.4.1.25623.1.1.4.2015.1633.1   1.3.6.1.4.1.25623.1.1.4.2015.1701.1
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2015-6837 BugTraq ID: 76738 http://www.securityfocus.com/bid/76738 Debian Security Information: DSA-3358 (Google Search) http://www.debian.org/security/2015/dsa-3358 https://security.gentoo.org/glsa/201606-10 http://www.securitytracker.com/id/1033548