Heap Buffer Overflow in PHP Affects Multiple Versions
CVE-2025-14178

6.5MEDIUM

Key Information:

Vendor

PHP Group

Status
PHP
Vendor
CVE Published:
27 December 2025

What is CVE-2025-14178?

A heap buffer overflow vulnerability has been identified in specific versions of PHP that occurs in the array_merge() function when the total element count of packed arrays exceeds 32-bit limits or HT_MAX_SIZE. This issue is triggered by an integer overflow during the precomputation of element counts using zend_hash_num_elements(). The vulnerability poses a risk of memory corruption or server crashes, ultimately affecting the integrity and availability of the targeted server.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

Deploy the Patch

Affected Version(s)

PHP 8.1.*

PHP 8.1.* < 8.1.34

PHP 8.2.* < 8.2.30

References

https://github.com/php/php-src/security/advisories/GHSA-h...

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Niels Dossche
JSON
.