Vulnerability Description
In PHP versions:8.1.* before 8.1.34, 8.2.* before 8.2.30, 8.3.* before 8.3.29, 8.4.* before 8.4.16, 8.5.* before 8.5.1, a heap buffer overflow occurs in array_merge() when the total element count of packed arrays exceeds 32-bit limits or HT_MAX_SIZE, due to an integer overflow in the precomputation of element counts using zend_hash_num_elements(). This may lead to memory corruption or crashes and affect the integrity and availability of the target server.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Php | Php | >= 8.1.0, < 8.1.34 |
Related Weaknesses (CWE)
References
- https://github.com/php/php-src/security/advisories/GHSA-h96m-rvf9-jgm2Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2026/01/msg00019.html
FAQ
What is CVE-2025-14178?
CVE-2025-14178 is a vulnerability with a CVSS score of 6.5 (MEDIUM). In PHP versions:8.1.* before 8.1.34, 8.2.* before 8.2.30, 8.3.* before 8.3.29, 8.4.* before 8.4.16, 8.5.* before 8.5.1, a heap buffer overflow occurs in array_merge() when the total element count of p...
How severe is CVE-2025-14178?
CVE-2025-14178 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-14178?
Check the references section above for vendor advisories and patch information. Affected products include: Php Php.