Out-of-bounds Read in Php
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.
Vulnerability class: Buffer Overflow
EPSS: 0.005 (38.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@php.net (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-14177?
- CVE-2025-14177 is a high-severity vulnerability in Php, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2025-12-27.
- How severe is CVE-2025-14177?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2025-14177 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.