CVE-2025-1218

The mysqlnd wire protocol parser reads fields out of server packets before checking that the packet still holds enough bytes for them. A malicious or compromised MySQL server can send a truncated packet and make the client read past the end of the packet buffer, which is undefined behaviour and can crash the process.

Score

CVSS 3.1 5.9 Medium

Status

Analyzed - security@php.net

Published

2026-09-25

Last modified

2026-10-23

Weaknesses

CWE-122

Affected products

• Php (Php)
• Php (Php Group)

References

• https://github.com/php/php-src/security/advisories/GHSA-r6x9-5r99-36j7