Vulnerabilities CVE-2026-63409

CVE-2026-63409

High

Open

TLP:CLEAR

Deskflow: Odd-length DSOP options vector causes out-of-bounds read in Deskflow client

NVD CVE.org

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Description

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.

Details

CVSS Score: 8.2
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Confidence: 90%
Published: Aug 17, 2026
Last Modified: Aug 17, 2026

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