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CVE-2016-9936

The unserialize implementation in ext/standard/var.c in PHP 7.x before 7.0.14 allows remote...

9.8 CriticalFix available

CVE-2016-9936 is a critical vulnerability (CVSS 9.8) in Php, published January 4, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.27%, the 91st percentile. Fixed in rh-php70-php 0:7.0.27-1.el6.

The unserialize implementation in ext/standard/var.c in PHP 7.x before 7.0.14 allows remote attackers to cause a denial of service (use-after-free) or possibly have unspecified other impact via crafted serialized data. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-6834.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

4.27%Up 2.9 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 9.8

The unserialize implementation in ext/standard/var.c in PHP 7.x before 7.0.14 allows remote attackers to cause a denial of service (use-after-free) or possibly have unspecified other impact via crafted serialized data. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-6834.

Record
CVE-2016-9936
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness
CWE-416
Updated
2026-11-02
CVE List No score

The unserialize implementation in ext/standard/var.c in PHP 7.x before 7.0.14 allows remote attackers to cause a denial of service (use-after-free) or possibly have unspecified other impact via crafted serialized data. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-6834.

Record
CVE-2016-9936
Updated
2026-11-02
EUVDEUVD-2016-10723 No score

The unserialize implementation in ext/standard/var.c in PHP 7.x before 7.0.14 allows remote attackers to cause a denial of service (use-after-free) or possibly have unspecified other impact via crafted serialized data. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-6834.

Record
EUVD-2016-10723
Updated
2026-11-03
GitHub AdvisoriesGHSA-jp9f-r2q5-mv5q 9.8

The unserialize implementation in ext/standard/var.c in PHP 7.x before 7.0.14 allows remote...

The unserialize implementation in ext/standard/var.c in PHP 7.x before 7.0.14 allows remote attackers to cause a denial of service (use-after-free) or possibly have unspecified other impact via crafted serialized data. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-6834.

Record
GHSA-jp9f-r2q5-mv5q
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-416
Updated
2026-11-02
OSV 9.8

The unserialize implementation in ext/standard/var.c in PHP 7.x before 7.0.14 allows remote attackers to cause a denial of service (use-after-free) or possibly have unspecified other impact via crafted serialized data. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-6834.

Record
CVE-2016-9936
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2018:1296 8.1

Red Hat Security Advisory: rh-php70-php security, bug fix, and enhancement update

Record
RHSA-2018:1296
CVSS 3.0
8.1 HighCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2016-9936 9.8

The unserialize implementation in ext/standard/var.c in PHP 7.x before 7.0.14 allows remote attackers to cause a denial of service (use-after-free) or possibly have unspecified other impact via crafted serialized data. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-6834.

Record
UBUNTU-CVE-2016-9936
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVSUSE-SU-2017:0017-1 No score

Security update for php7

This update for php7 fixes the following issues:

  • CVE-2016-9933 Possible stack overflow on truecolor images handling [bsc#1015187]
  • CVE-2016-9934 Dereference from NULL pointer could lead to crash [bsc#1015188]
  • CVE-2016-9935 Invalid read could lead to crash [bsc#1015189]
  • CVE-2016-9936 Use After free in the function serialize() could lead to crash [bsc#1015191]
Record
SUSE-SU-2017:0017-1
Updated
2026-11-02
OSVUSN-3211-1 No score

php7.0 vulnerabilities

It was discovered that PHP incorrectly handled certain invalid objects when unserializing data. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-7479)

It was discovered that PHP incorrectly handled certain invalid objects when unserializing data. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-9137)

It was discovered that PHP incorrectly handled unserializing certain wddxPacket XML documents. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-9935)

It was discovered that PHP incorrectly handled certain invalid objects when unserializing data. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-9936)

It was discovered that PHP incorrectly handled certain EXIF data. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service. (CVE-2016-10158)

It was discovered that PHP incorrectly handled certain PHAR archives. A remote attacker could use this issue to cause PHP to crash or consume resources, resulting in a denial of service. (CVE-2016-10159)

It was discovered that PHP incorrectly handled certain PHAR archives. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-10160)

It was discovered that PHP incorrectly handled certain invalid objects when unserializing data. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service. (CVE-2016-10161)

It was discovered that PHP incorrectly handled unserializing certain wddxPacket XML documents. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service. (CVE-2016-10162)

It was discovered that PHP incorrectly handled certain invalid objects when unserializing data. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2017-5340)

Record
USN-3211-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
rh-php70-php
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-bcmath
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-cli
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-common
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-dba
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-dbg
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-debuginfo
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-devel
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-embedded
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-enchant
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
Show 56 moreShow less
Affected packages
PackageAffectedFixed
rh-php70-php-fpm
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-gd
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-gmp
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-imap
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-intl
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-json
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-ldap
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-mbstring
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-mysqlnd
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-odbc
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-opcache
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-pdo
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-pgsql
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-process
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-pspell
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-recode
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-snmp
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-soap
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-tidy
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-xml
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-xmlrpc
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php-zip
Red Hat:rhel_software_collections:3::el6
before 0:7.0.27-1.el6
0:7.0.27-1.el6
rh-php70-php
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-bcmath
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-cli
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-common
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-dba
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-dbg
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-debuginfo
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-devel
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-embedded
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-enchant
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-fpm
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-gd
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-gmp
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-intl
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-json
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-ldap
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-mbstring
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-mysqlnd
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-odbc
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-opcache
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-pdo
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-pgsql
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-process
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-pspell
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-recode
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-snmp
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-soap
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-xml
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-xmlrpc
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
rh-php70-php-zip
Red Hat:rhel_software_collections:3::el7
before 0:7.0.27-1.el7
0:7.0.27-1.el7
php7
SUSE:Linux Enterprise Module for Web and Scripting 12
before 7.0.7-28.2
7.0.7-28.2
php7
SUSE:Linux Enterprise Software Development Kit 12 SP1
before 7.0.7-28.2
7.0.7-28.2
php7
SUSE:Linux Enterprise Software Development Kit 12 SP2
before 7.0.7-28.2
7.0.7-28.2
php7.0
Ubuntu:16.04:LTS
before 7.0.15-0ubuntu0.16.04.2, plus listed versions
7.0.1-57.0.1-67.0.2-17.0.2-37.0.2-4
Show 14 moreShow less
7.0.2-57.0.3-27.0.3-37.0.3-9ubuntu17.0.4-5ubuntu17.0.4-5ubuntu27.0.4-7ubuntu17.0.4-7ubuntu27.0.4-7ubuntu2.17.0.8-0ubuntu0.16.04.17.0.8-0ubuntu0.16.04.27.0.8-0ubuntu0.16.04.37.0.13-0ubuntu0.16.04.17.0.15-0ubuntu0.16.04.1
7.0.15-0ubuntu0.16.04.2

History

History
WhenChangedSources
2026-11-03aliasesEUVD
2026-11-02createdCVE List, GitHub Advisories, NVD, OSV

References

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