CVE-2025-14178

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 v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/php/php-src/security/advisories/GHSA-h96m-rvf9-jgm2	Vendor Advisory
https://lists.debian.org/debian-lts-announce/2026/01/msg00019.html

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:php:php::::::::
	cpe:2.3:a:php:php::::::::
	cpe:2.3:a:php:php::::::::
	cpe:2.3:a:php:php::::::::
	cpe:2.3:a:php:php::::::::

History

24 Jan 2026, 11:15

Type	Values Removed	Values Added
References		() https://lists.debian.org/debian-lts-announce/2026/01/msg00019.html -

09 Jan 2026, 20:28

Type	Values Removed	Values Added
First Time		Php Php php
CPE		cpe:2.3:a:php:php::::::::
References	~~() https://github.com/php/php-src/security/advisories/GHSA-h96m-rvf9-jgm2 -~~	() https://github.com/php/php-src/security/advisories/GHSA-h96m-rvf9-jgm2 - Vendor Advisory

27 Dec 2025, 20:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-12-27 20:15

Updated : 2026-01-24 11:15

NVD link : CVE-2025-14178

Mitre link : CVE-2025-14178

CVE.ORG link : CVE-2025-14178

JSON object : View

Products Affected

php

php

CWE

CWE-190

Integer Overflow or Wraparound

CWE-787

Out-of-bounds Write

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