Description
The finish_nested_data function in ext/standard/var_unserializer.re in PHP before 5.6.31, 7.0.x before 7.0.21, and 7.1.x before 7.1.7 is prone to a buffer over-read while unserializing untrusted data. Exploitation of this issue can have an unspecified impact on the integrity of PHP.
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 9 | php7.0 | 7.0.27-0+deb9u1 | DSA-4080-1 |
| Debian 8 | php5 | 5.6.33+dfsg-0+deb8u1 | DSA-4081-1 |
| Debian 7 | php5 | 5.4.45-0+deb7u11 | DLA-1076-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | php5 | 5.5.9+dfsg-1ubuntu4.23 | USN-3566-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | php5 | 5.5.9+dfsg-1ubuntu4.29+esm2 | USN-3566-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 3 | rh-php70-php +29 | 7.0.27-1.el6 | RHSA-2018:1296 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | php5 | 5.5.14-109.8.2 | SUSE-SU-2017:2518-1 |
| SLES 12 SP3 | php7 | 7.0.7-50.18.1 | SUSE-SU-2017:2468-1 |
| SLES 12 SP2 | php5 | 5.5.14-109.8.2 | SUSE-SU-2017:2518-1 |
| SLES 12 SP2 | php7 | 7.0.7-50.18.1 | SUSE-SU-2017:2468-1 |
| SLES 12 | php5 | 5.5.14-109.8.2 | SUSE-SU-2017:2518-1 |
| SLES 12 | php7 | 7.0.7-50.18.1 | SUSE-SU-2017:2468-1 |
| SLES 11 SP4 | php53 | 5.3.17-112.5.1 | SUSE-SU-2017:2522-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 11 SP4 | php53 | 5.3.17-112.5.1 | SUSE-SU-2017:2522-1 |
Advisories 10
- RHSA-2018:1296 Red Hat Security Advisory: rh-php70-php security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-3566-2 php5 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3566-1 php5 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4080-1 php7.0 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-4081-1 php5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1076-1 php5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2017:2522-1 Security update for php53 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2468-1 Security update for php7 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2518-1 Security update for php5 SUSE / openSUSE Security Updates · Feb 4, 2026
- VDE-2023-009 ads-tec: Multiple Vulnerabilities in IRF1000, IRF2000 and IRF3000 CERT@VDE · May 8, 2023
References
- RHSA-2018:1296 vendor-advisory
- http://php.net/ChangeLog-5.php
- https://bugs.php.net/bug.php?id=74111
- DSA-4081 vendor-advisory
- DSA-4080 vendor-advisory
- USN-3566-1 vendor-advisory
- http://php.net/ChangeLog-7.php
- 99490 vdb-entry
- USN-3566-2 vendor-advisory