CVE-2025-14177 Information Leak of Memory in getimagesize

What is CVE-2025-14177?

CVE-2025-14177 is a medium-severity vulnerability in Php Php, published on 27 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-125

Which versions are affected by CVE-2025-14177?

3 open source packages ship an affected version, including libphp, php and php-min. It affects 1 product.

Products include Php Php.

How do I fix CVE-2025-14177?

Upgrade libphp to a fixed version for your release line: 8.1.34, 8.2.30, 8.3.29 or 8.4.16.

Is CVE-2025-14177 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-14177 exists.

Public exploit code: 2 proofs of concept on GitHub.

Other vulnerabilities in Php Php

• CVE-2012-2688 Integer overflow in n/a Critical 10.0
• CVE-2012-2376 Memory corruption in n/a Critical 10.0
• CVE-2011-3268 Memory corruption in n/a Critical 10.0
• CVE-2009-4143 Other in n/a Critical 10.0
• CVE-2008-5557 Memory corruption in n/a Critical 10.0

All Php Php vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-73195, AZL-73240, BELL-CVE-2025-14177, BIT-libphp-2025-14177, BIT-php-2025-14177, BIT-php-min-2025-14177 and 9 more.