php: multiple unserialization use-after-free issues
Published May 16, 2016
9.8
CRITICALCVSS 3.0
EPSS 46.80%
Description
Multiple use-after-free vulnerabilities in PHP before 5.4.45, 5.5.x before 5.5.29, and 5.6.x before 5.6.13 allow remote attackers to execute arbitrary code via vectors related to (1) the Serializable interface, (2) the SplObjectStorage class, and (3) the SplDoublyLinkedList class, which are mishandled during unserialization.
Affected products
No data.
- ≤ 5.4.44
- 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
- 5.5.24
- 5.5.25
- 5.5.26
- 5.5.27
- 5.5.28
- 5.6.0
- 5.6.1
- 5.6.2
- 5.6.3
- 5.6.4
- 5.6.5
- 5.6.6
- 5.6.7
- 5.6.8
- 5.6.9
- 5.6.10
- 5.6.11
- 5.6.12
No data.
Red Hat Software Collections for Red Hat Enterprise Linux 6
rh-php56-php-0:5.6.5-8.el6
Fixed · RHSA-2016:0457
Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUS
rh-php56-php-0:5.6.5-8.el6
Fixed · RHSA-2016:0457
Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS
rh-php56-php-0:5.6.5-8.el6
Fixed · RHSA-2016:0457
Red Hat Software Collections for Red Hat Enterprise Linux 7
rh-php56-php-0:5.6.5-8.el7
Fixed · RHSA-2016:0457
Red Hat Software Collections for Red Hat Enterprise Linux 7.1 EUS
rh-php56-php-0:5.6.5-8.el7
Fixed · RHSA-2016:0457
Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUS
rh-php56-php-0:5.6.5-8.el7
Fixed · RHSA-2016:0457
Red Hat Enterprise Linux 5
php
Not affected
Red Hat Enterprise Linux 5
php53
Not affected
Red Hat Enterprise Linux 6
php
Not affected
Red Hat Enterprise Linux 7
php
Will not fix
Red Hat Software Collections
php54-php
Will not fix
Red Hat Software Collections
php55-php
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Software Collections for Red Hat Enterprise Linux 6 | rh-php56-php-0:5.6.5-8.el6 | Fixed | RHSA-2016:0457 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUS | rh-php56-php-0:5.6.5-8.el6 | Fixed | RHSA-2016:0457 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS | rh-php56-php-0:5.6.5-8.el6 | Fixed | RHSA-2016:0457 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 | rh-php56-php-0:5.6.5-8.el7 | Fixed | RHSA-2016:0457 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.1 EUS | rh-php56-php-0:5.6.5-8.el7 | Fixed | RHSA-2016:0457 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUS | rh-php56-php-0:5.6.5-8.el7 | Fixed | RHSA-2016:0457 |
| Red Hat Enterprise Linux 5 | php | Not affected | n/a |
| Red Hat Enterprise Linux 5 | php53 | Not affected | n/a |
| Red Hat Enterprise Linux 6 | php | Not affected | n/a |
| Red Hat Enterprise Linux 7 | php | Will not fix | n/a |
| Red Hat Software Collections | php54-php | Will not fix | n/a |
| Red Hat Software Collections | php55-php | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the versions of PHP as shipped with Red Hat Enterprise Linux 5 and 6. This issue is not currently planned to be corrected in future updates in Red Hat Enterprise Linux 7 and Red Hat Software Collections.
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:P/I:P/A:P
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 (52 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 46.80% (0.46801) | 98.79th | v5 (v2026.06.15) |
| Sep 22, 2026 | 46.80% (0.46801) | 98.77th | v5 (v2026.06.15) |
| Sep 21, 2026 | 42.61% (0.42610) | 98.69th | v5 (v2026.06.15) |
| Sep 6, 2026 | 46.80% (0.46801) | 98.75th | v5 (v2026.06.15) |
| Sep 5, 2026 | 42.61% (0.42610) | 98.66th | v5 (v2026.06.15) |
| Aug 30, 2026 | 46.80% (0.46801) | 98.74th | v5 (v2026.06.15) |
| Aug 28, 2026 | 42.61% (0.42610) | 98.65th | v5 (v2026.06.15) |
| Aug 24, 2026 | 46.80% (0.46801) | 98.73th | v5 (v2026.06.15) |
| Aug 23, 2026 | 42.61% (0.42610) | 98.65th | v5 (v2026.06.15) |
| Jun 15, 2026 | 46.80% (0.46801) | 98.67th | v5 (v2026.06.15) |
| May 31, 2026 | 35.45% (0.35455) | 97.14th | v4 (v2025.03.14) |
| Mar 4, 2026 | 37.24% (0.37239) | 97.09th | v4 (v2025.03.14) |
| Mar 1, 2026 | 34.15% (0.34148) | 96.91th | v4 (v2025.03.14) |
| Feb 4, 2026 | 37.24% (0.37239) | 97.06th | v4 (v2025.03.14) |
| Feb 1, 2026 | 34.15% (0.34148) | 96.88th | v4 (v2025.03.14) |
| Jan 16, 2026 | 37.24% (0.37239) | 97.04th | v4 (v2025.03.14) |
| Jan 4, 2026 | 38.95% (0.38954) | 97.13th | v4 (v2025.03.14) |
| Jan 1, 2026 | 35.82% (0.35819) | 96.96th | v4 (v2025.03.14) |
| Dec 28, 2025 | 38.95% (0.38954) | 97.12th | v4 (v2025.03.14) |
| Dec 27, 2025 | 47.28% (0.47280) | 97.60th | v4 (v2025.03.14) |
| Dec 4, 2025 | 38.95% (0.38954) | 97.09th | v4 (v2025.03.14) |
| Dec 1, 2025 | 35.82% (0.35819) | 96.92th | v4 (v2025.03.14) |
| Nov 4, 2025 | 38.95% (0.38954) | 97.08th | v4 (v2025.03.14) |
| Nov 1, 2025 | 35.82% (0.35819) | 96.91th | v4 (v2025.03.14) |
| Oct 28, 2025 | 40.28% (0.40276) | 97.16th | v4 (v2025.03.14) |
| Oct 27, 2025 | 42.05% (0.42050) | 97.28th | v4 (v2025.03.14) |
| Oct 4, 2025 | 40.28% (0.40276) | 97.24th | v4 (v2025.03.14) |
| Oct 1, 2025 | 27.26% (0.27262) | 96.25th | v4 (v2025.03.14) |
| Sep 4, 2025 | 42.64% (0.42641) | 97.39th | v4 (v2025.03.14) |
| Sep 1, 2025 | 29.33% (0.29330) | 96.46th | v4 (v2025.03.14) |
| Aug 19, 2025 | 42.05% (0.42050) | 97.33th | v4 (v2025.03.14) |
| Aug 4, 2025 | 45.53% (0.45530) | 97.50th | v4 (v2025.03.14) |
| Aug 1, 2025 | 35.85% (0.35852) | 96.96th | v4 (v2025.03.14) |
| Jul 30, 2025 | 45.53% (0.45530) | 97.50th | v4 (v2025.03.14) |
| Jul 4, 2025 | 37.24% (0.37239) | 96.98th | v4 (v2025.03.14) |
| Jul 1, 2025 | 34.15% (0.34148) | 96.80th | v4 (v2025.03.14) |
| Jun 21, 2025 | 37.24% (0.37239) | 96.97th | v4 (v2025.03.14) |
| Jun 16, 2025 | 29.98% (0.29979) | 96.39th | v4 (v2025.03.14) |
| Jun 4, 2025 | 32.80% (0.32801) | 96.64th | v4 (v2025.03.14) |
| Jun 1, 2025 | 29.49% (0.29490) | 96.37th | v4 (v2025.03.14) |
| May 4, 2025 | 32.80% (0.32801) | 96.60th | v4 (v2025.03.14) |
| May 1, 2025 | 29.49% (0.29490) | 96.33th | v4 (v2025.03.14) |
| Apr 12, 2025 | 32.80% (0.32801) | 96.53th | v4 (v2025.03.14) |
| Mar 30, 2025 | 44.99% (0.44988) | 97.32th | v4 (v2025.03.14) |
| Mar 29, 2025 | 49.56% (0.49556) | 96.79th | v4 (v2025.03.14) |
| Mar 17, 2025 | 44.99% (0.44988) | 97.29th | v4 (v2025.03.14) |
| Dec 12, 2024 | 20.11% (0.20110) | 96.53th | v3 (v2023.03.01) |
| Jun 15, 2024 | 20.11% (0.20110) | 96.36th | v3 (v2023.03.01) |
| Nov 8, 2023 | 19.76% (0.19757) | 95.78th | v3 (v2023.03.01) |
| Mar 7, 2023 | 23.44% (0.23440) | 95.77th | v3 (v2023.03.01) |
| Mar 6, 2023 | 24.77% (0.24768) | 96.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 24.77% (0.24768) | 95.34th | v2 (v2022.01.01) |
References (12)
- http://php.net/ChangeLog-5.php x_refsource_CONFIRM
- http://www.debian.org/security/2015/dsa-3358 vendor-advisoryx_refsource_DEBIAN
- http://www.securityfocus.com/bid/76649 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1033548 vdb-entryx_refsource_SECTRACK
- https://access.redhat.com/security/cve/CVE-2015-6834 Vendor Advisory
- https://bugs.php.net/bug.php?id=70172 x_refsource_CONFIRM
- https://bugs.php.net/bug.php?id=70365 x_refsource_CONFIRM
- https://bugs.php.net/bug.php?id=70366 x_refsource_CONFIRM
- https://bugzilla.redhat.com/show_bug.cgi?id=1260642 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2015-6834
- https://security.gentoo.org/glsa/201606-10 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2015-6834
| Link | Providers | Tags |
|---|---|---|
| http://php.net/ChangeLog-5.php | x_refsource_CONFIRM | |
| http://www.debian.org/security/2015/dsa-3358 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.securityfocus.com/bid/76649 | vdb-entryx_refsource_BID | |
| http://www.securitytracker.com/id/1033548 | vdb-entryx_refsource_SECTRACK | |
| https://access.redhat.com/security/cve/CVE-2015-6834 | Vendor Advisory | |
| https://bugs.php.net/bug.php?id=70172 | x_refsource_CONFIRM | |
| https://bugs.php.net/bug.php?id=70365 | x_refsource_CONFIRM | |
| https://bugs.php.net/bug.php?id=70366 | x_refsource_CONFIRM | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1260642 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2015-6834 | ||
| https://security.gentoo.org/glsa/201606-10 | vendor-advisoryx_refsource_GENTOO | |
| https://www.cve.org/CVERecord?id=CVE-2015-6834 |
Change history (0)
No recorded changes yet.