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Vulnerability record · CVE-2016-6290 · published 25 July 2016

CVE-2016-6290: Php use after free vulnerability

Php · Php

ext/session/session.c in PHP before 5.5.38, 5.6.x before 5.6.24, and 7.x before 7.0.9 does not properly maintain a certain hash data structure, which allows remote attackers to cause a denial of service (use-after-free) or possibly have unspecified other impact via vectors related to session deserialization.

9.8 CVSS 3.0 Critical EPSS 5.5% · top 7.5% CWE-416 · Use after free
9.8CVSS 3.0 base score, v2 7.5
5.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
24References
17 Jun 2026Last modified by NVD

Description

ext/session/session.c in PHP before 5.5.38, 5.6.x before 5.6.24, and 7.x before 7.0.9 does not properly maintain a certain hash data structure, which allows remote attackers to cause a denial of service (use-after-free) or possibly have unspecified other impact via vectors related to session deserialization.

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://git.php.net/?p=php-src.git%3Ba=commit%3Bh=3798eb6fd5dddb211b01d41495072fd9858d4e32
http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html
http://openwall.com/lists/oss-security/2016/07/24/2 Mailing ListRelease Notes
http://php.net/ChangeLog-5.php Release Notes
http://php.net/ChangeLog-7.php
http://rhn.redhat.com/errata/RHSA-2016-2750.html
http://www.debian.org/security/2016/dsa-3631
http://www.securityfocus.com/bid/92097 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1036430
https://bugs.php.net/72562 Issue Tracking
https://security.gentoo.org/glsa/201611-22
https://support.apple.com/HT207170
http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=3798eb6fd5dddb211b01d41495072fd9858d4e32
http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html
http://openwall.com/lists/oss-security/2016/07/24/2 Mailing ListRelease Notes
http://php.net/ChangeLog-5.php Release Notes
http://php.net/ChangeLog-7.php
http://rhn.redhat.com/errata/RHSA-2016-2750.html
http://www.debian.org/security/2016/dsa-3631
http://www.securityfocus.com/bid/92097 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1036430
https://bugs.php.net/72562 Issue Tracking
https://security.gentoo.org/glsa/201611-22
https://support.apple.com/HT207170

Track CVE-2016-6290 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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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2016-6290), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.