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Vulnerability record · CVE-2017-5340 · published 11 January 2017

CVE-2017-5340: Php integer overflow vulnerability

Php · Php

Zend/zend_hash.c in PHP before 7.0.15 and 7.1.x before 7.1.1 mishandles certain cases that require large array allocations, which allows remote attackers to execute arbitrary code or cause a denial of service (integer overflow, uninitialized memory access, and use of arbitrary destructor function pointers) via crafted serialized data.

9.8 CVSS 3.1 Critical EPSS 17% · top 3.1% CWE-190 · Integer overflow
9.8CVSS 3.1 base score, v2 7.5
17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
12References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Zend/zend_hash.c in PHP before 7.0.15 and 7.1.x before 7.1.1 mishandles certain cases that require large array allocations, which allows remote attackers to execute arbitrary code or cause a denial of service (integer overflow, uninitialized memory access, and use of arbitrary destructor function pointers) via crafted serialized data.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

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

References

LinkTags
http://www.securityfocus.com/bid/95371 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1037659 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2018:1296 Third Party Advisory
https://bugs.php.net/bug.php?id=73832 ExploitIssue TrackingVDB EntryVendor Advisory
https://github.com/php/php-src/commit/4cc0286f2f3780abc6084bcdae5dce595daa3c12 PatchThird Party Advisory
https://security.netapp.com/advisory/ntap-20180112-0001/ Third Party Advisory
http://www.securityfocus.com/bid/95371 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1037659 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2018:1296 Third Party Advisory
https://bugs.php.net/bug.php?id=73832 ExploitIssue TrackingVDB EntryVendor Advisory
https://github.com/php/php-src/commit/4cc0286f2f3780abc6084bcdae5dce595daa3c12 PatchThird Party Advisory
https://security.netapp.com/advisory/ntap-20180112-0001/ Third Party Advisory

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2017-5340), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.