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CVE-2016-7479

53
FAUCET Score

CVE-2016-7479 is a critical use-after-free vulnerability affecting all versions of PHP 7 during the unserialization process. This flaw, rated 9.8 CVSS, allows an unauthenticated remote attacker to achieve arbitrary code execution with low attack complexity. While there is no known public exploit code or active exploitation (KEV), the vulnerability has garnered significant community discussion and media coverage, indicating its potential impact and the need for patching.

Impacted Technologies

VendorProductVersion(s)CPE
7.0.0CPE matchmatch criteria
cpe:2.3:a:php:php:7.0.0:*:*:*:*:*:*:*
7.0.1CPE matchmatch criteria
cpe:2.3:a:php:php:7.0.1:*:*:*:*:*:*:*
7.0.2CPE matchmatch criteria
cpe:2.3:a:php:php:7.0.2:*:*:*:*:*:*:*
7.0.3CPE matchmatch criteria
cpe:2.3:a:php:php:7.0.3:*:*:*:*:*:*:*
7.0.4CPE matchmatch criteria
cpe:2.3:a:php:php:7.0.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
41.94%
Probability of exploitation in next 30 days
EPSS Percentile
98.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.4194 is in the 96th percentile among its peer group of 36,821 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (12)

redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: rh-php70-php-0:7.0.27-1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUSFixed in: rh-php70-php-0:7.0.27-1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-php70-php-0:7.0.27-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUSFixed in: rh-php70-php-0:7.0.27-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSFixed in: rh-php70-php-0:7.0.27-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSFixed in: rh-php70-php-0:7.0.27-1.el7
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: php
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: php53
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: php
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: php
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Enterprise 2Fixed in: php
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-php56-php

Vendor Advisories (1)

redhatCVE-2016-7479Moderate

php: Use-after-free vulnerability when resizing the 'properties' hash table of a serialized object

Dec 27, 2016

References

blog.checkpoint.com / 2016/12/27/check-point-discovers-three-zero-day-vulnerabilities-web-programming-language-php-7
Third Party Advisory
blog.checkpoint.com / wp-content/uploads/2016/12/PHP_Technical_Report.pdf
ExploitTechnical DescriptionThird Party Advisory
access.redhat.com / errata/RHSA-2018:1296
bugs.php.net / bug.php
Issue TrackingPermissions Required
security.netapp.com / advisory/ntap-20180112-0001
youtube.com / watch
Technical Description
securityfocus.com / bid/95151
Third Party AdvisoryVDB Entry
securitytracker.com / id/1037659