CVE-2025-14178

HighCVSS 8.2/10Last modified Oct 13, 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.

Metrics

CVSS 3.1 8.2/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Weakness enumeration

Affected software

No affected versions have been published.

Timeline

Published
Dec 27, 2025
Last modified
Oct 13, 2026
NVD status
Modified

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CVE-2025-14178: High severity, CVSS 8.2 | Vulnix