CVE-2025-14181

The SOAP HTTP client guards its response buffer growth with a check that relies on signed integer overflow, which is undefined behaviour and is not guaranteed to trigger. When the check is optimised away, a malicious SOAP server can make the client allocate a buffer far smaller than the data it then writes into it, producing a heap buffer overflow.

• https://github.com/php/php-src/security/advisories/GHSA-cj93-vc83-wgqv
• https://github.com/php/php-src/security/advisories/GHSA-cj93-vc83-wgqv