deskflow: Deskflow is a keyboard and mouse sharing app
CVE-2026-63409 is fixed in deskflow on 1 platform by DEBIAN-CVE-2026-63409 (version 1.26.0+dfsg-4), released August 31, 2026. It is not reported as exploited. Patch Radar priority: High.
Deskflow is a keyboard and mouse sharing app. From 1.17.0 until continuous build 1.26.0.296, a malicious Deskflow server can send an odd-length DSOP vector to ServerProxy::setOptions() in src/lib/client/ServerProxy.cpp, causing the missing value after the final option key to be read beyond the vector during the PacketStreamFilter::filterEvent to ServerProxy::handleData() to ServerProxy::parseHandshakeMessage() call chain and crash the connected client. This issue is fixed in continuous build 1.26.0.296.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| deskflow · Debian 14 | 1.26.0+dfsg-4 | DEBIAN-CVE-2026-63409 | Aug 31, 2026 |
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