Description
ext/standard/var_unserializer.re in PHP before 5.6.26 mishandles object-deserialization failures, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via an unserialize call that references a partially constructed object.
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 | 5.6.26+dfsg-0+deb8u1 | DSA-3689-1 |
| Debian 7 | php5 | 5.4.45-0+deb7u6 | DLA-749-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | php7.0 | 7.0.8-0ubuntu0.16.04.3 | USN-3095-1 |
| Ubuntu 14.04 LTS | php5 | 5.5.9+dfsg-1ubuntu4.20 | USN-3095-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | php5 | 5.5.14-78.1 | SUSE-SU-2016:2477-1 |
| SLES 12 | php5 | 5.5.14-78.1 | SUSE-SU-2016:2477-2, SUSE-SU-2016:2477-1 |
| SLES 11 SP4 | php53 | 5.3.17-84.1 | SUSE-SU-2016:2459-1 |
| SLES 11 SP3 | php53 | 5.3.17-84.1 | SUSE-SU-2016:2459-1 |
| SLES 11 SP2 | php53 | 5.3.17-58.1 | SUSE-SU-2016:2461-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 11 SP4 | php53 | 5.3.17-84.1 | SUSE-SU-2016:2459-1 |
| SUSE OpenStack Cloud 5 | php53 | 5.3.17-84.1 | SUSE-SU-2016:2459-1 |
| SUSE Manager Proxy 2.1 | php53 | 5.3.17-84.1 | SUSE-SU-2016:2459-1 |
| SUSE Manager 2.1 | php53 | 5.3.17-84.1 | SUSE-SU-2016:2459-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | php53 | 5.3.17-84.1 | SUSE-SU-2016:2459-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.3 | php | 5.6.27-r0 | — |
| Alpine v3.2 | php | 5.6.27-r0 | — |
Advisories 8
- USN-3095-1 php5, php7.0 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-749-1 php5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3689-1 php5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:2459-1 Security update for php53 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2461-1 Security update for php53 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2477-2 Security update for php5 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2477-1 Security update for php5 SUSE / openSUSE Security Updates · May 2, 2025
- VDE-2023-009 ads-tec: Multiple Vulnerabilities in IRF1000, IRF2000 and IRF3000 CERT@VDE · May 8, 2023
References
- GLSA-201611-22 vendor-advisory
- 1036836 vdb-entry
- https://bugs.php.net/bug.php?id=73052
- [oss-security] 20160915 Re: CVE assignment for PHP 5.6.26 and 7.0.11 mailing-list
- https://github.com/php/php-src/commit/6a7cc8ff85827fa9ac715b3a83c2d9147f33cd43?w=1
- http://www.php.net/ChangeLog-5.php
- 93009 vdb-entry