Low · published September 26, 2026
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.
| Product | Versions | Fixed in |
|---|---|---|
| php/php | ≥ 8.2.0, < 8.2.34 | 8.2.34 |
| php/php | ≥ 8.3.0, < 8.3.35 | 8.3.35 |
| php/php | ≥ 8.4.0, < 8.4.26 | 8.4.26 |
| php/php | ≥ 8.5.0, < 8.5.11 | 8.5.11 |