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PHP CVEs

Vulnerabilities in the PHP language itself, and which PHP versions they affect.

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CVE-2015-6838

HIGH 7.5 CVSS 3.0
Published
May 16, 2016
Last modified
June 17, 2026
NVD status
Modified
Reported by
security@opentext.com
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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 after the principal argument loop, 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-2015-6837.

Affected products and versions

  • PHP — Up to and including 5.4.44
  • PHP versions 5.5.0, 5.5.0alpha1, 5.5.0alpha2, 5.5.0alpha3, 5.5.0alpha4, 5.5.0alpha5, 5.5.0alpha6, 5.5.0beta1, 5.5.0beta2, 5.5.0beta3, 5.5.0beta4, 5.5.0rc1, 5.5.0rc2, 5.5.1, 5.5.2, 5.5.3, 5.5.4, 5.5.5, 5.5.6, 5.5.7, 5.5.8, 5.5.9, 5.5.10, 5.5.11, 5.5.12, 5.5.13, 5.5.14, 5.5.15, 5.5.16, 5.5.17, 5.5.18, 5.5.19, 5.5.20, 5.5.21, 5.5.22, 5.5.23, 5.5.24, 5.5.25, 5.5.26, 5.5.27, 5.5.28, 5.6.0alpha1, 5.6.0alpha2, 5.6.0alpha3, 5.6.0alpha4, 5.6.0alpha5, 5.6.0beta1, 5.6.0beta2, 5.6.0beta3, 5.6.0beta4, 5.6.1, 5.6.2, 5.6.3, 5.6.4, 5.6.5, 5.6.6, 5.6.7, 5.6.8, 5.6.9, 5.6.10, 5.6.11, 5.6.12

References