php: Use of uninitialized value in SplObjectStorag::unserialize
Published Jan 11, 2017
9.8
CRITICALCVSS 3.1
EPSS 41.56%
Description
The SplObjectStorage unserialize implementation in ext/spl/spl_observer.c in PHP before 7.0.12 does not verify that a key is an object, which allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized memory access) via crafted serialized data.
Affected products
- Vendor n/a Product PHP before 7.0.12 Defaultn/a
- Version PHP before 7.0.12StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | PHP before 7.0.12 | n/a |
|
Configuration 2
- n/a
No data.
Red Hat Enterprise Linux 5
php
Will not fix
Red Hat Enterprise Linux 5
php53
Will not fix
Red Hat Enterprise Linux 6
php
Will not fix
Red Hat Enterprise Linux 7
php
Will not fix
Red Hat OpenShift Enterprise 2
php
Will not fix
Red Hat Software Collections
rh-php56-php
Will not fix
Red Hat Software Collections
rh-php70-php
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | php | Will not fix | n/a |
| Red Hat Enterprise Linux 5 | php53 | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | php | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | php | Will not fix | n/a |
| Red Hat OpenShift Enterprise 2 | php | Will not fix | n/a |
| Red Hat Software Collections | rh-php56-php | Will not fix | n/a |
| Red Hat Software Collections | rh-php70-php | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS:3.0/AV:N/AC:H/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 (34 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 41.56% (0.41558) | 98.64th | v5 (v2026.06.15) |
| Jun 15, 2026 | 41.56% (0.41558) | 98.50th | v5 (v2026.06.15) |
| Dec 27, 2025 | 3.46% (0.03463) | 87.22th | v4 (v2025.03.14) |
| Aug 12, 2025 | 4.61% (0.04608) | 88.81th | v4 (v2025.03.14) |
| Aug 5, 2025 | 3.21% (0.03209) | 86.53th | v4 (v2025.03.14) |
| Aug 1, 2025 | 1.78% (0.01782) | 82.02th | v4 (v2025.03.14) |
| Jul 21, 2025 | 3.35% (0.03346) | 86.77th | v4 (v2025.03.14) |
| Jul 10, 2025 | 4.64% (0.04642) | 88.82th | v4 (v2025.03.14) |
| Jul 5, 2025 | 5.87% (0.05870) | 90.14th | v4 (v2025.03.14) |
| Jul 1, 2025 | 3.52% (0.03521) | 87.20th | v4 (v2025.03.14) |
| Jun 21, 2025 | 5.87% (0.05870) | 90.13th | v4 (v2025.03.14) |
| Jun 5, 2025 | 2.29% (0.02290) | 83.88th | v4 (v2025.03.14) |
| Jun 1, 2025 | 1.24% (0.01244) | 78.36th | v4 (v2025.03.14) |
| May 6, 2025 | 2.29% (0.02290) | 83.79th | v4 (v2025.03.14) |
| May 1, 2025 | 1.24% (0.01244) | 78.25th | v4 (v2025.03.14) |
| Apr 14, 2025 | 2.29% (0.02290) | 83.34th | v4 (v2025.03.14) |
| Apr 13, 2025 | 1.24% (0.01244) | 77.56th | v4 (v2025.03.14) |
| Apr 10, 2025 | 2.29% (0.02290) | 83.34th | v4 (v2025.03.14) |
| Apr 9, 2025 | 1.24% (0.01244) | 77.55th | v4 (v2025.03.14) |
| Apr 8, 2025 | 2.29% (0.02290) | 83.32th | v4 (v2025.03.14) |
| Apr 7, 2025 | 1.24% (0.01244) | 77.54th | v4 (v2025.03.14) |
| Apr 2, 2025 | 2.29% (0.02290) | 83.29th | v4 (v2025.03.14) |
| Apr 1, 2025 | 1.24% (0.01244) | 77.48th | v4 (v2025.03.14) |
| Mar 30, 2025 | 2.29% (0.02290) | 83.24th | v4 (v2025.03.14) |
| Mar 29, 2025 | 10.36% (0.10364) | 88.58th | v4 (v2025.03.14) |
| Mar 28, 2025 | 2.29% (0.02290) | 83.25th | v4 (v2025.03.14) |
| Mar 27, 2025 | 1.24% (0.01244) | 76.91th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.29% (0.02290) | 83.55th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.47% (0.00475) | 76.52th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.47% (0.00475) | 74.99th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.47% (0.00475) | 71.95th | v3 (v2023.03.01) |
| Mar 6, 2023 | 4.84% (0.04845) | 89.33th | v2 (v2022.01.01) |
| Apr 1, 2022 | 4.84% (0.04845) | 88.29th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.84% (0.04845) | 74.71th | v2 (v2022.01.01) |
References (12)
- http://blog.checkpoint.com/2016/12/27/check-point-discovers-three-zero-day-vulnerabilities-web-programming-language-php-7 x_refsource_MISCThird Party AdvisoryVDB Entry
- http://blog.checkpoint.com/wp-content/uploads/2016/12/PHP_Technical_Report.pdf x_refsource_MISCExploitTechnical DescriptionThird Party Advisory
- http://php.net/ChangeLog-7.php x_refsource_MISCRelease NotesVendor Advisory
- http://www.securityfocus.com/bid/95152 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2016-7480 Vendor Advisory
- https://bugs.php.net/bug.php?id=73257 x_refsource_MISCIssue TrackingPatchVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1416499 Issue Tracking
- https://github.com/php/php-src/commit/61cdd1255d5b9c8453be71aacbbf682796ac77d4 x_refsource_MISCPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2016-7480
- https://security.netapp.com/advisory/ntap-20180112-0001/ x_refsource_CONFIRMThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2016-7480
- https://www.youtube.com/watch?v=LDcaPstAuPk x_refsource_MISCBroken LinkThird Party Advisory
Change history (0)
No recorded changes yet.