CVE-2026-63409 PUBLISHED

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

Assigner: GitHub_M
Reserved: 16.07.2026 Published: 17.08.2026 Updated: 17.08.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
CVSS Score: 8.2

Product Status

Vendor deskflow
Product deskflow
Versions
  • Version >= 1.17.0, < 1.26.0.296 is affected

References

Problem Types

  • CWE-125: Out-of-bounds Read CWE