CVE-2026-41476 Deskflow: clipboard deserialization global-buffer-overflow
A remote attacker can trigger a global-buffer-overflow in Deskflow via malformed clipboard data, potentially leading to code execution or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-41476?
CVE-2026-41476 is a high-severity memory corruption vulnerability in deskflow, published on 24 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Deskflow is a keyboard and mouse sharing app. Prior to 1.26.0.138, a remote memory-safety vulnerability in Deskflow's clipboard deserialization allows a connected peer to trigger an out-of-bounds read by sending a malformed clipboard update. The issue is in the implementation of src/lib/deskflow/IClipboard.cpp. This is reachable because ClipboardChunk::assemble() in src/lib/deskflow/ClipboardChunk.cpp validates only the outer clipboard transfer size. It does not validate the internal structure of the serialized clipboard blob, so malformed inner lengths reach IClipboard::unmarshall() unchanged. This vulnerability is fixed in 1.26.0.138.
Weakness: CWE-120
Which versions are affected by CVE-2026-41476?
It affects 1 product.
Products include Deskflow Deskflow.
How do I fix CVE-2026-41476?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-41476 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-41476 exists.
Other vulnerabilities in deskflow
Sources
Also known as DEBIAN-CVE-2026-41476, UBUNTU-CVE-2026-41476.