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.
http://www.securityfocus.com/bid/95151
http://blog.checkpoint.com/2016/12/27/check-point-discovers-three-zero-day-vulnerabilities-web-programming-language-php-7
https://www.youtube.com/watch?v=LDcaPstAuPk
https://security.netapp.com/advisory/ntap-20180112-0001/
https://bugs.php.net/bug.php?id=73092
https://access.redhat.com/errata/RHSA-2018:1296
http://www.securitytracker.com/id/1037659
Source: Mitre, NVD
Published: 2017-01-12
Updated: 2025-04-20
Base Score: 7.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
Severity: High
Base Score: 9.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: Critical
EPSS: 0.01626