Bug 2517644 (CVE-2026-65976)

Summary: CVE-2026-65976 deskflow: Deskflow: Denial of Service due to excessive clipboard data accumulation
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Deskflow, a keyboard and mouse sharing application. A connected peer can send repeated data messages to the clipboard receiver, causing it to accumulate data beyond its configured size limit. This excessive data accumulation can lead to the exhaustion of receiver memory, resulting in a Denial of Service (DoS) for the application.
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Bug Depends On: 2521883, 2521885    
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Description OSIDB Bzimport 2026-08-17 21:12:02 UTC
Deskflow is a keyboard and mouse sharing app. From 1.17.0 until continuous build 1.26.0.300, a connected peer can send repeated DCLP DataChunk messages to ClipboardChunk::assemble() in src/lib/deskflow/ClipboardChunk.cpp, causing the server path in src/lib/server/ClientProxy1_6.cpp or client path in src/lib/client/ServerProxy.cpp to append data beyond the DataStart declared size and configured clipboard limit before DataEnd validation, exhausting receiver memory. This issue is fixed in continuous build 1.26.0.300.