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6.5 Medium

CVE-2025-14178 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…

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.

Affected products and versions

Product Affected versions Fixed in
PHP 8.5 earliest → < 8.5.1 8.5.1
PHP 8.4 earliest → < 8.4.16 8.4.16
PHP 8.3 earliest → < 8.3.29 8.3.29
PHP 8.2 earliest → < 8.2.30 8.2.30
PHP 8.1 earliest → < 8.1.34 8.1.34

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