CVE-2025-14177: php_group php Out-of-bounds Read

Vulnerability summary

CVE-2025-14177 is a high (CVSS 7.5) Out-of-bounds Read vulnerability in php_group php. EPSS estimates a 0.51% chance of exploitation in the next 30 days, higher than 42.1% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 27-12-2025
   PublishedVulnerability first disclosed.
2. 29-12-2025
   Last modifiedVulnerability information updated.

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.

• CWE-125Out-of-bounds ReadThe product reads data past the end, or before the beginning, of the intended buffer.