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Vulnerability record · CVE-2017-12932 · published 18 August 2017

CVE-2017-12932: Php use after free vulnerability

Php · Php

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.

9.8 CVSS 3.0 Critical EPSS 7.4% · top 5.8% CWE-416 · Use after free
9.8CVSS 3.0 base score, v2 7.5
7.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
18References
17 Jun 2026Last modified by NVD

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.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

Track CVE-2017-12932 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2017-12932), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.