High severity7.5NVD Advisory· Published May 16, 2016· Updated Jun 17, 2026
CVE-2015-6837
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
76cpe:2.3:a:php:php:*:*:*:*:*:*:*:*+ 63 more
- cpe:2.3:a:php:php:*:*:*:*:*:*:*:*range: <=5.4.44
- cpe:2.3:a:php:php:5.5.0:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.0:alpha1:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.0:alpha2:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.0:alpha3:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.0:alpha4:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.0:alpha5:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.0:alpha6:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.0:beta1:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.0:beta2:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.0:beta3:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.0:beta4:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.0:rc1:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.0:rc2:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.1:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.10:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.11:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.12:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.13:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.14:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.15:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.16:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.17:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.18:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.19:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.2:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.20:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.21:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.22:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.23:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.24:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.25:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.26:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.27:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.28:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.3:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.4:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.5:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.6:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.7:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.8:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.5.9:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.6.0:alpha1:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.6.0:alpha2:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.6.0:alpha3:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.6.0:alpha4:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.6.0:alpha5:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.6.0:beta1:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.6.0:beta2:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.6.0:beta3:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.6.0:beta4:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.6.1:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.6.10:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.6.11:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.6.12:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.6.2:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.6.3:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.6.4:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.6.5:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.6.6:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.6.7:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.6.8:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.6.9:*:*:*:*:*:*:*
- (no CPE)range: <5.4.45, <5.5.29, <5.6.13
- osv-coords11 versionspkg:rpm/suse/php53&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP2-LTSSpkg:rpm/suse/php53&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3pkg:rpm/suse/php53&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-TERADATApkg:rpm/suse/php53&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4pkg:rpm/suse/php53&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP3pkg:rpm/suse/php53&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4pkg:rpm/suse/php53&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2011%20SP3pkg:rpm/suse/php53&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2011%20SP4pkg:rpm/suse/php5&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Web%20and%20Scripting%2012pkg:rpm/suse/php5&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP2-LTSSpkg:rpm/suse/php5&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012
< 5.3.17-47.1+ 10 more
- (no CPE)range: < 5.3.17-47.1
- (no CPE)range: < 5.3.17-48.1
- (no CPE)range: < 5.3.17-48.1
- (no CPE)range: < 5.3.17-48.1
- (no CPE)range: < 5.3.17-48.1
- (no CPE)range: < 5.3.17-48.1
- (no CPE)range: < 5.3.17-48.1
- (no CPE)range: < 5.3.17-48.1
- (no CPE)range: < 5.5.14-36.1
- (no CPE)range: < 5.2.14-0.7.30.72.1
- (no CPE)range: < 5.5.14-36.1
Patches
Vulnerability mechanics
References
6News mentions
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