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Vulnerability record · CVE-2016-7480 · published 11 January 2017

CVE-2016-7480: Php memory buffer overflow vulnerability

Php · Php

The SplObjectStorage unserialize implementation in ext/spl/spl_observer.c in PHP before 7.0.12 does not verify that a key is an object, which allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized memory access) via crafted serialized data.

9.8 CVSS 3.1 Critical EPSS 42% · top 1.4% CWE-119 · Memory buffer overflow
9.8CVSS 3.1 base score, v2 7.5
42%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
16References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

The SplObjectStorage unserialize implementation in ext/spl/spl_observer.c in PHP before 7.0.12 does not verify that a key is an object, which allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized memory access) 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://blog.checkpoint.com/2016/12/27/check-point-discovers-three-zero-day-vulnerabilities-web-programming-language-php- Third Party AdvisoryVDB Entry
http://blog.checkpoint.com/wp-content/uploads/2016/12/PHP_Technical_Report.pdf ExploitTechnical DescriptionThird Party Advisory
http://php.net/ChangeLog-7.php Release NotesVendor Advisory
http://www.securityfocus.com/bid/95152 Third Party AdvisoryVDB Entry
https://bugs.php.net/bug.php?id=73257 Issue TrackingPatchVendor Advisory
https://github.com/php/php-src/commit/61cdd1255d5b9c8453be71aacbbf682796ac77d4 PatchThird Party Advisory
https://security.netapp.com/advisory/ntap-20180112-0001/ Third Party Advisory
https://www.youtube.com/watch?v=LDcaPstAuPk Broken LinkThird Party Advisory
http://blog.checkpoint.com/2016/12/27/check-point-discovers-three-zero-day-vulnerabilities-web-programming-language-php- Third Party AdvisoryVDB Entry
http://blog.checkpoint.com/wp-content/uploads/2016/12/PHP_Technical_Report.pdf ExploitTechnical DescriptionThird Party Advisory
http://php.net/ChangeLog-7.php Release NotesVendor Advisory
http://www.securityfocus.com/bid/95152 Third Party AdvisoryVDB Entry
https://bugs.php.net/bug.php?id=73257 Issue TrackingPatchVendor Advisory
https://github.com/php/php-src/commit/61cdd1255d5b9c8453be71aacbbf682796ac77d4 PatchThird Party Advisory
https://security.netapp.com/advisory/ntap-20180112-0001/ Third Party Advisory
https://www.youtube.com/watch?v=LDcaPstAuPk Broken LinkThird Party Advisory

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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-2016-7480), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.