CVE-2025-14177

Information Leak of Memory in getimagesize

State: Published
Severity: 6.3 Medium
Published: Dec 27, 2025
Updated: Dec 29, 2025
Reserved: Dec 6, 2025

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, the getimagesize() function may leak uninitialized heap memory into the APPn segments (e.g., APP1) when reading images in multi-chunk mode (such as via php://filter). This occurs due to a bug in php_read_stream_all_chunks() that overwrites the buffer without advancing the pointer, leaving tail bytes uninitialized. This may lead to information disclosure of sensitive heap data and affect the confidentiality of the target server.

Scores

CVSS	Score	Vector	Source
4.0	6.3 Medium	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N	php

Weaknesses

CWE-125 Out-of-bounds Read

Affected Products

Product	Versions
PHPPHP Group	8.1.* to before 8.1.34Affected 8.2.* to before 8.2.30Affected 8.3.* to before 8.3.29Affected 8.4.* to before 8.4.16Affected 8.5.* to before 8.5.1Affected

References

https://github.com/php/php-src/security/advisories/GHSA-3237-qqm7-mfv7

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