Description
In all versions of PHP 7, during the unserialization process, resizing the 'properties' hash table of a serialized object may lead to use-after-free. A remote attacker may exploit this bug to gain arbitrary code execution.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | PHP 7.x | PHP 7.x | — |
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 | 5.6.30+dfsg-0+deb8u1 | DSA-3783-1 |
| Debian 7 | php5 | 5.4.45-0+deb7u8 | DLA-875-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | php7.0 | 7.0.15-0ubuntu0.16.04.2 | USN-3211-1 |
| Ubuntu 14.04 LTS | php5 | 5.5.9+dfsg-1ubuntu4.21 | USN-3196-1 |
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 SP2 | php7 | 7.0.7-35.1 | SUSE-SU-2017:0534-1 |
| SLES 12 SP1 | php7 | 7.0.7-35.1 | SUSE-SU-2017:0534-1 |
| SLES 12 | php7 | 7.0.7-35.1 | SUSE-SU-2017:0534-1 |
Advisories 6
- 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-3211-1 php7.0 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3196-1 php5 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-875-1 php5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3783-1 php5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2017:0534-1 Security update for php7 SUSE / openSUSE Security Updates · Feb 4, 2026
References
- http://blog.checkpoint.com/wp-content/uploads/2016/12/PHP_Technical_Report.pdf
- https://www.youtube.com/watch?v=LDcaPstAuPk
- https://bugs.php.net/bug.php?id=73092
- RHSA-2018:1296 vendor-advisory
- https://security.netapp.com/advisory/ntap-20180112-0001/
- 95151 vdb-entry
- 1037659 vdb-entry
- http://blog.checkpoint.com/2016/12/27/check-point-discovers-three-zero-day-vulnerabilities-web-programming-language-php-7