Critical · published December 16, 2025
⚡ A sneaky buffer overflow in NanoMQ could pop up anytime you send a PUBLISH packet! 🎉 If you're on a version prior to 0.24.4, you might be in hot water! Think of it like a crowded buffet where the chef keeps serving more food than the table can hold. Eventually, the excess food spills everywhere, causing a chaotic mess — just like how the buffer overflow can cause unexpected behavior in your application. If exploited, this vulnerability could lead to unexpected crashes or even arbitrary code execution. Imagine a scenario where an attacker sends malicious data, causing your messaging broker to behave erratically or crash, disrupting IoT operations in the process. This could be absolutely devastating for your edge devices!
Think of it like a crowded buffet where the chef keeps serving more food than the table can hold. Eventually, the excess food spills everywhere, causing a chaotic mess — just like how the buffer overflow can cause unexpected behavior in your application. This buffer overflow vulnerability arises from how NanoMQ handles shared and vanilla subscriptions when processing PUBLISH packets. Attackers could exploit this by sending specially crafted packets, potentially leading to damage in the system or unauthorized access.
If exploited, this vulnerability could lead to unexpected crashes or even arbitrary code execution. Imagine a scenario where an attacker sends malicious data, causing your messaging broker to behave erratically or crash, disrupting IoT operations in the process. This could be absolutely devastating for your edge devices! To remediate this vulnerability, update your NanoMQ to version 0.24.4 or later. As a temporary workaround, ensure that shared subscriptions are disabled until you've completed the upgrade. Don't delay on this! You've got this! Follow these steps to keep your IoT messaging secure and your operations running smoothly. 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| emqx/nanomq | < 0.24.4 | 0.24.4 |