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CVE-2015-6832

20
FAUCET Score

CVE-2015-6832 is a use-after-free vulnerability in PHP's SPL unserialize implementation, affecting versions before 5.4.44, 5.5.28, and 5.6.12. This flaw allows remote attackers to execute arbitrary code by supplying specially crafted serialized data. With a CVSS score of 7.3 (HIGH), it presents a significant risk, as it can be exploited over the network with low attack complexity, potentially leading to partial loss of confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.4.43CPE matchmatch criteria
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
5.5.0CPE matchmatch criteria
cpe:2.3:a:php:php:5.5.0:*:*:*:*:*:*:*
5.5.0CPE matchmatch criteria
cpe:2.3:a:php:php:5.5.0:alpha1:*:*:*:*:*:*
5.5.0CPE matchmatch criteria
cpe:2.3:a:php:php:5.5.0:alpha2:*:*:*:*:*:*
5.5.0CPE matchmatch criteria
cpe:2.3:a:php:php:5.5.0:alpha3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.3HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
3.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
5.15%
Probability of exploitation in next 30 days
EPSS Percentile
91.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0515 is in the 85th percentile among its peer group of 51,506 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (13)

redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.1 EUSFixed in: rh-php56-php-0:5.6.5-8.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUSFixed in: rh-php56-php-0:5.6.5-8.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: rh-php56-php-0:5.6.5-8.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUSFixed in: rh-php56-php-0:5.6.5-8.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUSFixed in: rh-php56-php-0:5.6.5-8.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-php56-php-0:5.6.5-8.el7
View patch
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: php54-php
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: php
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: php55-php
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Enterprise 2Fixed in: php
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

Vendor Advisories (1)

redhatCVE-2015-6832Moderate

php: dangling pointer in the unserialization of ArrayObject items

Aug 6, 2015

References

bugs.php.net / bug.php
security.gentoo.org / glsa/201606-10
debian.org / security/2015/dsa-3344
php.net / ChangeLog-5.php