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TI-2026-45196 Aliases CVE-2026-63409

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

Priority HIGH 75CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00452 39th percentileScored 2026-11-07
Fix Fixed deskflow (deskflow): 1.26.0.296

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
deskflowdeskflow1.17.0 to before 1.26.0.2961.26.0.296Patch availableCNA
  • deskflow Vendordeskflow Affected 1.17.0 to before 1.26.0.296 Fixed in 1.26.0.296 Patch available CNA

Remediation

  • Fix · CNA deskflow (deskflow) Fixed in 1.26.0.296

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-63409

References

Other 2

  • TI-2026-46910 Out-of-bounds read in deskflow CVSS 3.1HIGH 8.2
  • TI-2026-30065 Deskflow: Local privilege escalation via unauthenticated IPC CVSS 3.1HIGH 7.8
  • TI-2026-30064 Deskflow: clipboard deserialization global-buffer-overflow CVSS 4.0HIGH 7.4
  • TI-2026-32267 Deskflow: TLS multiplexer DoS on failed `SSL_accept` CVSS 3.1HIGH 7.5
  • TI-2026-46991 Deskflow: Clipboard receiver can accumulate data beyond Deskflow's configured clipboard size limit CVSS 3.1MEDIUM 6.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences