CVE-2016-7479

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 41.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2017-01-12 · updated 2026-06-17
Weakness: CWE-416

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

PHP: 7.0.0, 7.0.1, 7.0.2, 7.0.3, 7.0.4, 7.0.5 (+9)

References

http://blog.checkpoint.com/2016/12/27/check-point-discovers-three-zero-day-vulnerabilities-web-programming-language-php-7
http://blog.checkpoint.com/wp-content/uploads/2016/12/PHP_Technical_Report.pdf
http://www.securityfocus.com/bid/95151
http://www.securitytracker.com/id/1037659
https://access.redhat.com/errata/RHSA-2018:1296
https://bugs.php.net/bug.php?id=73092
https://security.netapp.com/advisory/ntap-20180112-0001/
https://www.youtube.com/watch?v=LDcaPstAuPk
http://blog.checkpoint.com/2016/12/27/check-point-discovers-three-zero-day-vulnerabilities-web-programming-language-php-7
http://blog.checkpoint.com/wp-content/uploads/2016/12/PHP_Technical_Report.pdf
http://www.securityfocus.com/bid/95151
http://www.securitytracker.com/id/1037659

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