php: Incomplete Class unserialization type confusion
Published May 16, 2016
9.8
CRITICALCVSS 3.0
EPSS 10.67%
Description
The __PHP_Incomplete_Class function in ext/standard/incomplete_class.c in PHP before 5.4.40, 5.5.x before 5.5.24, and 5.6.x before 5.6.8 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via an unexpected data type, related to a "type confusion" issue.
Affected products
No data.
Configuration 1
- 6.0
- 7.0
Configuration 2
- ≤ 5.4.39
- 5.5.0
- 5.5.1
- 5.5.2
- 5.5.3
- 5.5.4
- 5.5.5
- 5.5.6
- 5.5.7
- 5.5.8
- 5.5.9
- 5.5.10
- 5.5.11
- 5.5.12
- 5.5.13
- 5.5.14
- 5.5.15
- 5.5.16
- 5.5.17
- 5.5.18
- 5.5.19
- 5.5.20
- 5.5.21
- 5.5.22
- 5.5.23
- 5.6.0
- 5.6.1
- 5.6.2
- 5.6.3
- 5.6.4
- 5.6.5
- 5.6.6
- 5.6.7
Configuration 3
- 7.0
- 7.0
- 7.1
- 7.0
- 7.1
- 7.0
No data.
Red Hat Enterprise Linux 6
php-0:5.3.3-46.el6_6
Fixed · RHSA-2015:1218
Red Hat Enterprise Linux 7
php-0:5.4.16-36.ael7b_1
Fixed · RHSA-2015:1135
Red Hat Software Collections for Red Hat Enterprise Linux 6
php54-0:2.0-1.el6
Fixed · RHSA-2015:1066
Red Hat Software Collections for Red Hat Enterprise Linux 6
php54-php-0:5.4.40-1.el6
Fixed · RHSA-2015:1066
Red Hat Software Collections for Red Hat Enterprise Linux 6
php54-php-pecl-zendopcache-0:7.0.4-3.el6
Fixed · RHSA-2015:1066
Red Hat Software Collections for Red Hat Enterprise Linux 6
php55-php-0:5.5.21-4.el6
Fixed · RHSA-2015:1186
Red Hat Software Collections for Red Hat Enterprise Linux 6
rh-php56-php-0:5.6.5-7.el6
Fixed · RHSA-2015:1187
Red Hat Software Collections for Red Hat Enterprise Linux 6.5 EUS
php54-0:2.0-1.el6
Fixed · RHSA-2015:1066
Red Hat Software Collections for Red Hat Enterprise Linux 6.5 EUS
php54-php-0:5.4.40-1.el6
Fixed · RHSA-2015:1066
Red Hat Software Collections for Red Hat Enterprise Linux 6.5 EUS
php54-php-pecl-zendopcache-0:7.0.4-3.el6
Fixed · RHSA-2015:1066
Red Hat Software Collections for Red Hat Enterprise Linux 6.5 EUS
php55-php-0:5.5.21-4.el6
Fixed · RHSA-2015:1186
Red Hat Software Collections for Red Hat Enterprise Linux 6.5 EUS
rh-php56-php-0:5.6.5-7.el6
Fixed · RHSA-2015:1187
Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUS
php54-0:2.0-1.el6
Fixed · RHSA-2015:1066
Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUS
php54-php-0:5.4.40-1.el6
Fixed · RHSA-2015:1066
Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUS
php54-php-pecl-zendopcache-0:7.0.4-3.el6
Fixed · RHSA-2015:1066
Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUS
php55-php-0:5.5.21-4.el6
Fixed · RHSA-2015:1186
Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUS
rh-php56-php-0:5.6.5-7.el6
Fixed · RHSA-2015:1187
Red Hat Software Collections for Red Hat Enterprise Linux 7
php54-0:2.0-1.el7
Fixed · RHSA-2015:1066
Red Hat Software Collections for Red Hat Enterprise Linux 7
php54-php-0:5.4.40-1.el7
Fixed · RHSA-2015:1066
Red Hat Software Collections for Red Hat Enterprise Linux 7
php54-php-pecl-zendopcache-0:7.0.4-3.el7
Fixed · RHSA-2015:1066
Red Hat Software Collections for Red Hat Enterprise Linux 7
php55-php-0:5.5.21-4.el7
Fixed · RHSA-2015:1186
Red Hat Software Collections for Red Hat Enterprise Linux 7
rh-php56-php-0:5.6.5-7.el7
Fixed · RHSA-2015:1187
Red Hat Software Collections for Red Hat Enterprise Linux 7.1 EUS
php55-php-0:5.5.21-4.el7
Fixed · RHSA-2015:1186
Red Hat Software Collections for Red Hat Enterprise Linux 7.1 EUS
rh-php56-php-0:5.6.5-7.el7
Fixed · RHSA-2015:1187
Red Hat Enterprise Linux 5
php
Will not fix
Red Hat Enterprise Linux 5
php53
Will not fix
Red Hat Software Collections
php54-php
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | php-0:5.3.3-46.el6_6 | Fixed | RHSA-2015:1218 |
| Red Hat Enterprise Linux 7 | php-0:5.4.16-36.ael7b_1 | Fixed | RHSA-2015:1135 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6 | php54-0:2.0-1.el6 | Fixed | RHSA-2015:1066 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6 | php54-php-0:5.4.40-1.el6 | Fixed | RHSA-2015:1066 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6 | php54-php-pecl-zendopcache-0:7.0.4-3.el6 | Fixed | RHSA-2015:1066 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6 | php55-php-0:5.5.21-4.el6 | Fixed | RHSA-2015:1186 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6 | rh-php56-php-0:5.6.5-7.el6 | Fixed | RHSA-2015:1187 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6.5 EUS | php54-0:2.0-1.el6 | Fixed | RHSA-2015:1066 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6.5 EUS | php54-php-0:5.4.40-1.el6 | Fixed | RHSA-2015:1066 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6.5 EUS | php54-php-pecl-zendopcache-0:7.0.4-3.el6 | Fixed | RHSA-2015:1066 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6.5 EUS | php55-php-0:5.5.21-4.el6 | Fixed | RHSA-2015:1186 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6.5 EUS | rh-php56-php-0:5.6.5-7.el6 | Fixed | RHSA-2015:1187 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUS | php54-0:2.0-1.el6 | Fixed | RHSA-2015:1066 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUS | php54-php-0:5.4.40-1.el6 | Fixed | RHSA-2015:1066 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUS | php54-php-pecl-zendopcache-0:7.0.4-3.el6 | Fixed | RHSA-2015:1066 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUS | php55-php-0:5.5.21-4.el6 | Fixed | RHSA-2015:1186 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUS | rh-php56-php-0:5.6.5-7.el6 | Fixed | RHSA-2015:1187 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 | php54-0:2.0-1.el7 | Fixed | RHSA-2015:1066 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 | php54-php-0:5.4.40-1.el7 | Fixed | RHSA-2015:1066 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 | php54-php-pecl-zendopcache-0:7.0.4-3.el7 | Fixed | RHSA-2015:1066 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 | php55-php-0:5.5.21-4.el7 | Fixed | RHSA-2015:1186 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 | rh-php56-php-0:5.6.5-7.el7 | Fixed | RHSA-2015:1187 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.1 EUS | php55-php-0:5.5.21-4.el7 | Fixed | RHSA-2015:1186 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.1 EUS | rh-php56-php-0:5.6.5-7.el7 | Fixed | RHSA-2015:1187 |
| Red Hat Enterprise Linux 5 | php | Will not fix | n/a |
| Red Hat Enterprise Linux 5 | php53 | Will not fix | n/a |
| Red Hat Software Collections | php54-php | Affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:L/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (22 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 10.67% (0.10671) | 95.68th | v5 (v2026.06.15) |
| Jun 15, 2026 | 10.47% (0.10474) | 95.16th | v5 (v2026.06.15) |
| May 9, 2026 | 11.01% (0.11011) | 93.49th | v4 (v2025.03.14) |
| Dec 28, 2025 | 12.86% (0.12863) | 93.80th | v4 (v2025.03.14) |
| Dec 27, 2025 | 17.65% (0.17650) | 94.91th | v4 (v2025.03.14) |
| Oct 28, 2025 | 12.86% (0.12863) | 93.72th | v4 (v2025.03.14) |
| Oct 27, 2025 | 17.65% (0.17650) | 94.83th | v4 (v2025.03.14) |
| Oct 1, 2025 | 12.86% (0.12863) | 93.81th | v4 (v2025.03.14) |
| Aug 19, 2025 | 17.65% (0.17650) | 94.82th | v4 (v2025.03.14) |
| Jul 30, 2025 | 25.05% (0.25053) | 95.94th | v4 (v2025.03.14) |
| May 30, 2025 | 18.82% (0.18820) | 94.94th | v4 (v2025.03.14) |
| May 23, 2025 | 14.89% (0.14887) | 94.16th | v4 (v2025.03.14) |
| Apr 12, 2025 | 16.02% (0.16017) | 94.23th | v4 (v2025.03.14) |
| Mar 30, 2025 | 17.70% (0.17696) | 94.58th | v4 (v2025.03.14) |
| Mar 29, 2025 | 27.25% (0.27245) | 94.23th | v4 (v2025.03.14) |
| Mar 17, 2025 | 17.70% (0.17696) | 94.60th | v4 (v2025.03.14) |
| Dec 17, 2024 | 12.41% (0.12407) | 95.40th | v3 (v2023.03.01) |
| Jul 9, 2023 | 9.67% (0.09669) | 93.97th | v3 (v2023.03.01) |
| Mar 7, 2023 | 7.07% (0.07067) | 92.88th | v3 (v2023.03.01) |
| Mar 6, 2023 | 6.70% (0.06698) | 91.56th | v2 (v2022.01.01) |
| Apr 1, 2022 | 6.70% (0.06698) | 90.75th | v2 (v2022.01.01) |
| Feb 4, 2022 | 6.70% (0.06698) | 78.74th | v2 (v2022.01.01) |
References (15)
- http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=fb83c76deec58f1fab17c350f04c9f042e5977d1 x_refsource_CONFIRM
- http://php.net/ChangeLog-5.php x_refsource_CONFIRM
- http://rhn.redhat.com/errata/RHSA-2015-1135.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2015-1186.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2015-1187.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2015-1218.html vendor-advisoryx_refsource_REDHAT
- http://www.openwall.com/lists/oss-security/2015/06/16/12 mailing-listx_refsource_MLIST
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html x_refsource_CONFIRM
- http://www.securityfocus.com/bid/75249 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1032709 vdb-entryx_refsource_SECTRACK
- https://access.redhat.com/security/cve/CVE-2015-4602 Vendor Advisory
- https://bugs.php.net/bug.php?id=69152 x_refsource_CONFIRMExploit
- https://bugzilla.redhat.com/show_bug.cgi?id=1232923 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2015-4602
- https://www.cve.org/CVERecord?id=CVE-2015-4602
Change history (0)
No recorded changes yet.