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Vulnerability record · CVE-2015-6831 · published 19 January 2016

CVE-2015-6831: Php use after free vulnerability

Php · Php

Multiple use-after-free vulnerabilities in SPL in PHP before 5.4.44, 5.5.x before 5.5.28, and 5.6.x before 5.6.12 allow remote attackers to execute arbitrary code via vectors involving (1) ArrayObject, (2) SplObjectStorage, and (3) SplDoublyLinkedList, which are mishandled during unserialization.

7.3 CVSS 3.1 High EPSS 7.1% · top 6.0% CWE-416 · Use after free
7.3CVSS 3.1 base score, v2 7.5
7.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
18References
17 Jun 2026Last modified by NVD

Description

Multiple use-after-free vulnerabilities in SPL in PHP before 5.4.44, 5.5.x before 5.5.28, and 5.6.x before 5.6.12 allow remote attackers to execute arbitrary code via vectors involving (1) ArrayObject, (2) SplObjectStorage, and (3) SplDoublyLinkedList, which are mishandled during unserialization.

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

Affected products

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

References

LinkTags
http://www.debian.org/security/2015/dsa-3344
http://www.openwall.com/lists/oss-security/2015/08/19/3
http://www.php.net/ChangeLog-5.php
http://www.securityfocus.com/bid/76737
https://bugs.php.net/bug.php?id=70155
https://bugs.php.net/bug.php?id=70166
https://bugs.php.net/bug.php?id=70168
https://bugs.php.net/bug.php?id=70169
https://security.gentoo.org/glsa/201606-10
http://www.debian.org/security/2015/dsa-3344
http://www.openwall.com/lists/oss-security/2015/08/19/3
http://www.php.net/ChangeLog-5.php
http://www.securityfocus.com/bid/76737
https://bugs.php.net/bug.php?id=70155
https://bugs.php.net/bug.php?id=70166
https://bugs.php.net/bug.php?id=70168
https://bugs.php.net/bug.php?id=70169
https://security.gentoo.org/glsa/201606-10

Track CVE-2015-6831 inside VULONE

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Source: NIST National Vulnerability Database (record CVE-2015-6831), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.