Out-of-bounds Write Affecting php package, versions [8.1.0,8.1.34)[8.2.0,8.2.30)[8.3.0,8.3.29)[8.4.0,8.4.16)[8.5.0,8.5.1)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-PHP-14755012
- published31 Dec 2025
- disclosed27 Dec 2025
- creditNiels Dossche
Introduced: 27 Dec 2025
CVE-2025-14178 (opens in a new tab)How to fix?
Upgrade php to version 8.1.34, 8.2.30, 8.3.29, 8.4.16, 8.5.1 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Write in the array_merge function when processing arrays with a total element count exceeding the 32-bit integer limit or the internal HT_MAX_SIZE constant, due to an integer overflow in the precomputation of element counts using the zend_hash_num_elements function. An attacker can cause memory corruption or crash the process by supplying specially crafted arrays with an excessive number of elements. This is only exploitable if the attacker can provide arrays large enough to bypass memory limits and trigger the overflow condition.