Use-after-free vulnerability in the _zend_shared_memdup function in zend_shared_alloc.c…
Priority MEDIUM 44CWE-416Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- Partial Red Hat: 6 fixed, 1 without a fix
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.
Summary
Use-after-free vulnerability in the _zend_shared_memdup function in zend_shared_alloc.c in the OPcache extension in PHP through 5.6.7 allows remote attackers to cause a denial of service or possibly have unspecified other impact via unknown vectors.
Why it matters now
EPSS 0.08314 94th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 2 advisoriesRed Hat: 6 fixed, 1 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:oracle:secure_backup:*:*:*:*:*:*:*:* | up to 12.1.0.1.0 | Vulnerable | Oracle |
| cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* | up to 10.6.8 | Vulnerable | Apple |
| cpe:2.3:a:php:php:*:*:*:*:*:*:*:* | before 5.5.24; 5.6.0 to before 5.6.8 | Vulnerable | PHP |
| cpe:2.3:o:oracle:linux:6:*:*:*:*:*:*:* | 6 | Vulnerable | Oracle |
| cpe:2.3:o:oracle:linux:7:*:*:*:*:*:*:* | 7 | Vulnerable | Oracle |
| cpe:2.3:o:oracle:solaris:11.2:*:*:*:*:*:*:* | 11.2 | Vulnerable | Oracle |
- cpe:2.3:a:oracle:secure_backup:*:*:*:*:*:*:*:* Versions up to 12.1.0.1.0 Vulnerable ·Oracle
- cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* Versions up to 10.6.8 Vulnerable ·Apple
- cpe:2.3:a:php:php:*:*:*:*:*:*:*:* Versions before 5.5.24; 5.6.0 to before 5.6.8 Vulnerable ·PHP
- cpe:2.3:o:oracle:linux:6:*:*:*:*:*:*:* Versions 6 Vulnerable ·Oracle
- cpe:2.3:o:oracle:linux:7:*:*:*:*:*:*:* Versions 7 Vulnerable ·Oracle
- cpe:2.3:o:oracle:solaris:11.2:*:*:*:*:*:*:* Versions 11.2 Vulnerable ·Oracle
Remediation
Red Hat 2 advisories
- RHSA-2015:1053 Released 2015-06-04 · Red Hat rating Moderatephp55 security and bug fix update
- Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) php55-2.0-1.el6, php55-php-5.5.21-2.el6, php55-php-bcmath-5.5.21-2.el6 +27
- Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) php55-2.0-1.el7, php55-php-5.5.21-2.el7, php55-php-bcmath-5.5.21-2.el7 +25
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.5) php55-2.0-1.el6, php55-php-5.5.21-2.el6, php55-php-bcmath-5.5.21-2.el6 +27
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.6) php55-2.0-1.el6, php55-php-5.5.21-2.el6, php55-php-bcmath-5.5.21-2.el6 +27
- Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) php55-2.0-1.el6, php55-php-5.5.21-2.el6, php55-php-bcmath-5.5.21-2.el6 +27
- Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) php55-2.0-1.el7, php55-php-5.5.21-2.el7, php55-php-bcmath-5.5.21-2.el7 +25
- RHSA-2015:1066 Released 2015-06-04 · Red Hat rating Importantphp54 security and bug fix update
- Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) php54-2.0-1.el6, php54-php-5.4.40-1.el6, php54-php-bcmath-5.4.40-1.el6 +26
- Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) php54-2.0-1.el7, php54-php-5.4.40-1.el7, php54-php-bcmath-5.4.40-1.el7 +24
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.5) php54-2.0-1.el6, php54-php-5.4.40-1.el6, php54-php-bcmath-5.4.40-1.el6 +26
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.6) php54-2.0-1.el6, php54-php-5.4.40-1.el6, php54-php-bcmath-5.4.40-1.el6 +26
- Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) php54-2.0-1.el6, php54-php-5.4.40-1.el6, php54-php-bcmath-5.4.40-1.el6 +26
- Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) php54-2.0-1.el7, php54-php-5.4.40-1.el7, php54-php-bcmath-5.4.40-1.el7 +24
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Software Collections | Affected | No fix yet |
| Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2015:1053, RHSA-2015:1066 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2015:1053, RHSA-2015:1066 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.5) | Fixed | RHSA-2015:1053, RHSA-2015:1066 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.6) | Fixed | RHSA-2015:1053, RHSA-2015:1066 |
| Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2015:1053, RHSA-2015:1066 |
| Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2015:1053, RHSA-2015:1066 |
Not affected: 4 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Software Collections
Timeline
- 2026-10-02 Threatist record created from CVE-2015-1351
- 2026-10-03 Alias added: GHSA-4p3m-vcw5-28gr
- 2026-10-11 EPSS moved to the 95th–99th percentile
- 2026-10-23 EPSS moved to the 90th–95th percentile
References
Advisory 9
- [oss-security] 20150124 Re: CVE Request: PHP
- APPLE-SA-2015-09-30-3
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- MDVSA-2015:079
- http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html
- https://support.apple.com/HT205267
- RHSA-2015:1053
- GLSA-201606-10
- RHSA-2015:1066
Sources
- CVE-2015-1351 · CVE Program
- CVE-2015-1351 · NVD
- FIRST EPSS
- GHSA-4p3m-vcw5-28gr · GitHub Advisory Database · CC BY 4.0
- CVE-2015-1351 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences