HIGH 7.5 NVD
CVE-2025-63235
In sol commit 373d848 (2024-12-12), the broker does not fully release resources when handling malformed or duplicate CONNECT packets. When clients send invalid
In sol commit 373d848 (2024-12-12), the broker does not fully release resources when handling malformed or duplicate CONNECT packets. When clients send invalid CONNECT packets - either due to repeated attempts or failed authentication - the server may silently drop the connection or send a CONNACK but fail to close the session or deallocate internal resources. This behavior allows an attacker to create numerous half-open connections that consume memory and file descriptors indefinitely, potentially triggering the Linux OOM killer and causing a denial of service.
References
- https://github.com/codepr/sol/issues/12
- https://github.com/peter-pe/sol-vulnerabilities/blob/main/CVE-2025-63235.md
- https://github.com/codepr/sol/issues/12
- https://github.com/peter-pe/sol-vulnerabilities/blob/main/CVE-2025-63235.md
This high severity vulnerability with a CVSS score of 7.5 was published on 2026-08-07 via NVD.
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