Bug 2512606 (CVE-2025-63235)

Summary: CVE-2025-63235 codepr sol: Sol: Denial of service via resource exhaustion from malformed CONNECT packets
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in sol. The broker does not fully release resources when handling malformed or duplicate CONNECT packets. A remote attacker can send invalid CONNECT packets, which may cause the server to silently drop the connection or send a CONNACK without properly closing the session or deallocating internal resources. This behavior allows an attacker to create numerous half-open connections, consuming memory and file descriptors indefinitely, potentially leading to a denial of service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-08-07 18:51:41 UTC
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.