CVE-2025-14178 (GCVE-0-2025-14178)

Vulnerability from cvelistv5 – Published: 2025-12-27 19:27 – Updated: 2026-01-24 11:04
VLAI
Title
Heap buffer overflow in array_merge()
Summary
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.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-787 - Out-of-bounds Write
  • CWE-190 - Integer Overflow or Wraparound
Assigner
php
References
Impacted products
Vendor Product Version
PHP Group PHP Affected: 8.1.* , < 8.1.34 (semver)
Affected: 8.2.* , < 8.2.30 (semver)
Affected: 8.3.* , < 8.3.29 (semver)
Affected: 8.4.* , < 8.4.16 (semver)
Affected: 8.5.* , < 8.5.1 (semver)
Create a notification for this product.
Date Public
2025-12-18 00:00
Credits
Niels Dossche
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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