Oracle Linux: CVE-2025-14177: ELSA-2026-1409: php:8.2 security update (IMPORTANT) (Multiple Advisories)

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.
A flaw was found in PHP. The getimagesize() function may leak uninitialized heap memory when processing images in multi-chunk mode, such as through php://filter. This vulnerability, caused by a bug in php_read_stream_all_chunks() that overwrites the buffer without advancing the pointer, allows an attacker to potentially disclose sensitive information from the server's memory. This could compromise the confidentiality of data on the affected server.