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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 8 | php5 | 5.6.13+dfsg-0+deb8u1 | DSA-3358-1 |
| Debian 7 | php5 | 5.4.45-0+deb7u1 | DSA-3358-1 |
| Debian 6.0 | php5 | 5.3.3.1-7+squeeze28 | DLA-341-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | php5 | 5.5.9+dfsg-1ubuntu4.13 | USN-2758-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 2 | rh-php56-php +27 | 5.6.5-8.el6 | RHSA-2016:0457 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | php5 | 5.5.14-36.1 | SUSE-SU-2015:1633-1 |
| SLES 11 SP4 | php53 | 5.3.17-48.1 | SUSE-SU-2015:1818-1 |
| SLES 11 SP3 | php53 | 5.3.17-48.1 | SUSE-SU-2015:1818-1 |
| SLES 11 SP2 | php5 | 5.2.14-0.7.30.72.1 | SUSE-SU-2015:1701-1 |
| SLES 11 SP2 | php53 | 5.3.17-47.1 | SUSE-SU-2016:1638-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 11 SP4 | php53 | 5.3.17-48.1 | SUSE-SU-2015:1818-1 |
| SLES for SAP 11 SP3 | php53 | 5.3.17-48.1 | SUSE-SU-2015:1818-1 |
Advisories 9
- RHSA-2016:0457 Red Hat Security Advisory: rh-php56-php security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-2758-1 php5 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-341-1 php5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3358-1 php5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2015:1701-1 Security update for php5 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1633-1 Security update for php5 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1638-1 Security update for php53 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1818-1 Security update for php53 SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2025-1425 PHP: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 30, 2025
References
- 76738 vdb-entry
- 1033548 vdb-entry
- https://bugs.php.net/bug.php?id=69782
- http://php.net/ChangeLog-5.php
- DSA-3358 vendor-advisory
- GLSA-201606-10 vendor-advisory