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.
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History
Fri, 07 Aug 2026 21:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Title | Resource Leak in CONNECT Packet Handling Leading to Denial of Service |
Fri, 07 Aug 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-400 | |
| Metrics |
cvssV3_1
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Fri, 07 Aug 2026 19:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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 |
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Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2026-08-07T19:13:19.127Z
Reserved: 2025-10-27T00:00:00.000Z
Link: CVE-2025-63235
Updated: 2026-08-07T19:11:41.262Z
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OpenCVE Enrichment
Updated: 2026-08-07T20:45:03Z
Weaknesses