VULNERABILITY INTELLIGENCE

CVE-2025-14178

CVSS score6.5 MEDIUM
EPSS probability0.46%
CISA KEVNot currently listed
Published2025-12-27
Last modified2026-10-13
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

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.

Weakness classification

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

Primary references