{"id":"UBUNTU-CVE-2026-63409","details":"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.","modified":"2026-08-19T13:32:30.637914097Z","published":"2026-08-17T21:16:00Z","upstream":["CVE-2026-63409"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-63409"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-63409"},{"type":"REPORT","url":"https://github.com/deskflow/deskflow/commit/8266fbbe6af93fa370018886c7f1f35d2cee8b3f"},{"type":"REPORT","url":"https://github.com/deskflow/deskflow/security/advisories/GHSA-gmvh-3c73-m5gg"}],"affected":[{"package":{"name":"deskflow","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/deskflow?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.23.0+dfsg-1","1.24.0+dfsg-2","1.25.0+dfsg-2","1.25.0+dfsg-3","1.26.0+dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_name":"deskflow","binary_version":"1.26.0+dfsg-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63409.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}