CVE-2025-14178

Severity CVSS v4.0:

Pending analysis

Type:

CWE-190 Integer Overflow or Wraparound

Publication date:

27/12/2025

Last modified:

24/01/2026

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.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H CVSS v3.1 Severity and Metrics:

Base Score: 6.50 MEDIUM
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): Low
Availability (A): High

Base Score 3.x

6.50

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:php:php::::::::	8.1.0 (including)	8.1.34 (excluding)
cpe:2.3:a:php:php::::::::	8.2.0 (including)	8.2.30 (excluding)
cpe:2.3:a:php:php::::::::	8.3.0 (including)	8.3.29 (excluding)
cpe:2.3:a:php:php::::::::	8.4.0 (including)	8.4.16 (excluding)
cpe:2.3:a:php:php::::::::	8.5.0 (including)	8.5.1 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2025-14178

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools