SB20260424162 - Multiple vulnerabilities in NanoMQ

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Buffer overflow (CVE-ID: CVE-2025-59947)

The vulnerability allows a remote user to cause a denial of service and modify data.

The vulnerability exists due to a buffer overflow in PUBLISH packet handling when triggering both shared subscription and vanilla subscription. A remote user can send a specially crafted PUBLISH packet to cause a denial of service and modify data.

User interaction is required.

2) Use-after-free (CVE-ID: CVE-2025-59946)

The vulnerability allows a remote user to execute arbitrary code.

The vulnerability exists due to use-after-free in the sub info list when processing concurrent subscribe and unsubscribe operations. A remote user can trigger a race condition to execute arbitrary code.

Exploitation requires hitting a specific overlapping race window.

Remediation

Install update from vendor's website.

References

• https://github.com/nanomq/nanomq/security/advisories/GHSA-98f4-cmg8-x7f3
• https://github.com/nanomq/nanomq/security/advisories/GHSA-xg37-23w7-72p5