Description
Use-after-free vulnerability in the SPL unserialize implementation in ext/spl/spl_array.c in PHP before 5.4.44, 5.5.x before 5.5.28, and 5.6.x before 5.6.12 allows remote attackers to execute arbitrary code via crafted serialized data that triggers misuse of an array field.
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 | 5.6.12+dfsg-0+deb8u1 | DSA-3344-1 |
| Debian 7 | php5 | 5.4.44-0+deb7u1 | DSA-3344-1 |
| 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 |
Advisories 5
- 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-3344-1 php5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2015:1633-1 Security update for php5 SUSE / openSUSE Security Updates · Feb 4, 2026
References
- DSA-3344 vendor-advisory
- http://www.php.net/ChangeLog-5.php
- https://bugs.php.net/bug.php?id=70068
- GLSA-201606-10 vendor-advisory