CVE-2017-12932

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 7.4% 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 through 7.0.22 and 7.1.x through 7.1.8 is prone to a heap use after free while unserializing untrusted data, related to improper use of the hash API for key deletion in a situation with an invalid array size. 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 (+26)

References

http://php.net/ChangeLog-7.php
http://www.securityfocus.com/bid/100427
https://access.redhat.com/errata/RHSA-2018:1296
https://access.redhat.com/errata/RHSA-2019:2519
https://bugs.php.net/bug.php?id=74103
https://github.com/php/php-src/commit/1a23ebc1fff59bf480ca92963b36eba5c1b904c4
https://security.gentoo.org/glsa/201709-21
https://security.netapp.com/advisory/ntap-20180112-0001/
https://www.debian.org/security/2018/dsa-4080
http://php.net/ChangeLog-7.php
http://www.securityfocus.com/bid/100427
https://access.redhat.com/errata/RHSA-2018:1296

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