CVE-2017-12934

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-08-18 · updated 2026-06-17
Weakness: CWE-416

Description

ext/standard/var_unserializer.re in PHP 7.0.x before 7.0.21 and 7.1.x before 7.1.7 is prone to a heap use after free while unserializing untrusted data, related to the zval_get_type function in Zend/zend_types.h. Exploitation of this issue can have an unspecified impact on the integrity of PHP.

Affected products

PHP: 7.0.0, 7.0.1, 7.0.2, 7.0.3, 7.0.4, 7.0.5 (+22)

References

http://php.net/ChangeLog-7.php
http://www.securityfocus.com/bid/100428
https://access.redhat.com/errata/RHSA-2018:1296
https://bugs.php.net/bug.php?id=74101
https://www.debian.org/security/2018/dsa-4080
http://php.net/ChangeLog-7.php
http://www.securityfocus.com/bid/100428
https://access.redhat.com/errata/RHSA-2018:1296
https://bugs.php.net/bug.php?id=74101
https://www.debian.org/security/2018/dsa-4080

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