CVE-2025-14178

Published Dec 27, 2025

Last updated a month ago

Overview

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.
Source
security@php.net
NVD status
Modified
Products
php

Risk scores

CVSS 3.1

Type
Primary
Base score
8.2
Impact score
4.2
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Severity
HIGH

Weaknesses

security@php.net
CWE-190
nvd@nist.gov
CWE-190

Social media

Hype score
Not currently trending

Configurations