CVE-2025-63235

Published: Aug 7, 2026Modified: Aug 31, 2026Deferred

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability: 3.9 / Impact: 3.6

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

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.

Related CWEs

CWE-400

Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

References (4)

https://github.com/codepr/sol/issues/12

Source: cve@mitre.org

https://github.com/peter-pe/sol-vulnerabilities/blob/main/CVE-2025-63235.md

Source: cve@mitre.org

https://github.com/codepr/sol/issues/12

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

https://github.com/peter-pe/sol-vulnerabilities/blob/main/CVE-2025-63235.md

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

No history available yet.