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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.

PUBLISHED Reserved 2025-12-06 | Published 2025-12-27 | Updated 2025-12-27 | Assigner php




MEDIUM: 6.5CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

Problem types

CWE-787 Out-of-bounds Write

CWE-190 Integer Overflow or Wraparound

Product status

Default status
affected

8.1.* (semver) before 8.1.34
affected

8.2.* (semver) before 8.2.30
affected

8.3.* (semver) before 8.3.29
affected

8.4.* (semver) before 8.4.16
affected

8.5.* (semver) before 8.5.1
affected

Credits

Niels Dossche reporter

References

github.com/...hp-src/security/advisories/GHSA-h96m-rvf9-jgm2

cve.org (CVE-2025-14178)

nvd.nist.gov (CVE-2025-14178)

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Data based on CVE®. Copyright © 1999-2025, The MITRE Corporation. All rights reserved.