CVE-2025-14178

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.

How to fix CVE-2025-14178

To remediate CVE-2025-14178, upgrade the affected package to a fixed version below.

—upgrade to 8.1.34 or later
—upgrade to 8.1.34 or later
—upgrade to 8.1.34 or later
—upgrade to 7.4.33-1+deb11u10 or later
—upgrade to 7.4.33-1+deb11u10 or later
—upgrade to 8.2.30-1~deb12u1 or later
—upgrade to 8.4.16-1~deb13u1 or later

Is CVE-2025-14178 being exploited?

Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.

Affected packages (7)

from 0, < 8.1.34, >= 8.2.0, < 8.2.30, >= 8.3.0, < 8.3.29, >= 8.4.0, < 8.4.16, >= 8.5.0, < 8.5.1
from 0, < 8.1.34, >= 8.2.0, < 8.2.30, >= 8.3.0, < 8.3.29, >= 8.4.0, < 8.4.16, >= 8.5.0, < 8.5.1
from 0, < 8.1.34, >= 8.2.0, < 8.2.30, >= 8.3.0, < 8.3.29, >= 8.4.0, < 8.4.16, >= 8.5.0, < 8.5.1
from 0, < 7.4.33-1+deb11u10
from 0, < 7.4.33-1+deb11u10
from 0, < 8.2.30-1~deb12u1
from 0, < 8.4.16-1~deb13u1

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	HIGH8.2	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H