CVE-2025-14177
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.
- Score
- CVSS 3.1 7.5 High
- Status
- Analyzed - security@php.net
- Published
- 2025-12-27
- Last modified
- 2026-10-13
- Weaknesses
- CWE-125
Affected products
References
- https://github.com/php/php-src/security/advisories/GHSA-3237-qqm7-mfv7
