NULL Pointer Dereference Vulnerability in PHP's XSLT Processor
CVE-2015-6837

7.5HIGH

Key Information:

Vendor: PHP
Status: PHP; Libxml2
Vendor: CVE Published:; 16 May 2016

What is CVE-2015-6837?

The xsl_ext_function_php function in PHP's XSLT processor is susceptible to a NULL pointer dereference due to improper error handling when a NULL value is received, which can occur in earlier versions of PHP. This issue arises when processing specially crafted XML documents. Attackers can exploit this vulnerability to induce application crashes, resulting in a denial of service. Users of affected PHP versions should upgrade to mitigate this risk.