Description
spl_array.c in the SPL extension in PHP before 5.5.37 and 5.6.x before 5.6.23 improperly interacts with the unserialize implementation and garbage collection, which allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free and application crash) via crafted serialized data.
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 | 5.6.23+dfsg-0+deb8u1 | DSA-3618-1 |
| Debian 7 | php5 | 5.4.45-0+deb7u5 | DLA-628-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | php7.0 | 7.0.8-0ubuntu0.16.04.2 | USN-3045-1 |
| Ubuntu 14.04 LTS | php5 | 5.5.9+dfsg-1ubuntu4.19 | USN-3045-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 2 | rh-php56 +2 | 2.3-1.el6 | RHSA-2016:2750 |
| RHEL 2 | rh-php56-php +27 | 5.6.25-1.el6 | RHSA-2016:2750 |
| RHEL 2 | rh-php56-php-pear | 1:1.9.5-4.el6 | RHSA-2016:2750 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | php5 | 5.5.14-68.1 | SUSE-SU-2016:1842-1 |
| SLES 12 | php5 | 5.5.14-68.1 | SUSE-SU-2016:1842-1 |
| SLES 11 SP4 | php53 | 5.3.17-112.20.1 | SUSE-SU-2018:0806-1 |
| SLES 11 SP3 | php53 | 5.3.17-112.20.1 | SUSE-SU-2018:0806-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 11 SP4 | php53 | 5.3.17-112.20.1 | SUSE-SU-2018:0806-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | php53 | 5.3.17-112.20.1 | SUSE-SU-2018:0806-1 |
Advisories 6
- RHSA-2016:2750 Red Hat Security Advisory: rh-php56 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- USN-3045-1 php5, php7.0 vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-628-1 php5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3618-1 php5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:1842-1 Security update for php5 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0806-1 Security update for php53 SUSE / openSUSE Security Updates · Feb 4, 2026
References
- http://github.com/php/php-src/commit/3f627e580acfdaf0595ae3b115b8bec677f203ee?w=1
- APPLE-SA-2016-09-20 vendor-advisory
- openSUSE-SU-2016:1761 vendor-advisory
- openSUSE-SU-2016:1922 vendor-advisory
- RHSA-2016:2750 vendor-advisory
- https://bugs.php.net/bug.php?id=72433
- http://php.net/ChangeLog-5.php
- [oss-security] 20160623 Re: CVE for PHP 5.5.37 issues mailing-list
- DSA-3618 vendor-advisory
- 91401 vdb-entry
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731
- https://support.apple.com/HT207170