What’s Vulnerable › Vulnerabilities

CVE-2016-5772

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 9.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2016-08-07 · updated 2026-06-17
• Weakness: CWE-415

Description

Double free vulnerability in the php_wddx_process_data function in wddx.c in the WDDX extension in PHP before 5.5.37, 5.6.x before 5.6.23, and 7.x before 7.0.8 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via crafted XML data that is mishandled in a wddx_deserialize call.

Affected products

• Debian Linux: 8.0
• openSUSE Leap: 42.1
• Opensuse: 13.2
• PHP: before 5.5.37; from 5.6.0 before 5.6.23; from 7.0.0 before 7.0.8 — fixed in 5.5.37, 5.6.23, 7.0.8
• SUSE Linux Enterprise Debuginfo: 11-sp4
• SUSE Linux Enterprise Server: 11-sp4
• SUSE Linux Enterprise Software Development Kit: 11-sp4

How to fix

Upgrade to a fixed version: PHP 5.5.37, 5.6.23, 7.0.8. Check the vendor advisory for mitigations.

References

• http://github.com/php/php-src/commit/a44c89e8af7c2410f4bfc5e097be2a5d0639a60c?w=1
• http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html
• http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00004.html
• http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00025.html
• http://lists.opensuse.org/opensuse-updates/2016-08/msg00003.html
• http://php.net/ChangeLog-5.php
• http://php.net/ChangeLog-7.php
• http://rhn.redhat.com/errata/RHSA-2016-2750.html
• http://www.debian.org/security/2016/dsa-3618
• http://www.openwall.com/lists/oss-security/2016/06/23/4
• http://www.securityfocus.com/bid/91398
• https://bugs.php.net/bug.php?id=72340

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