{"id":"CVE-2026-63409","aliases":["DEBIAN-CVE-2026-63409","EUVD-2026-60463","GHSA-gmvh-3c73-m5gg","UBUNTU-CVE-2026-63409"],"status":"published","title":"Deskflow: Odd-length DSOP options vector causes out-of-bounds read in Deskflow client","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.","severity":{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00452,"percentile":0.39572,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-125"],"published":"2026-08-17T20:57:19Z","modified":"2026-10-28T11:17:05Z","fixes":[{"ecosystem":"Debian:14","package":"deskflow","fixed_in":["1.26.0+dfsg-4"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:13","package":"deskflow","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.22.0+dfsg-7","1.23.0+dfsg-1","1.23.0+dfsg-2","1.24.0+dfsg-1","1.24.0+dfsg-2","1.25.0+dfsg-1","1.25.0+dfsg-2","1.25.0+dfsg-3","1.26.0+dfsg-1","1.26.0+dfsg-2","1.26.0+dfsg-3","1.26.0+dfsg-4","1.26.0+dfsg-5"]},{"source":"osv","ecosystem":"Debian:14","package":"deskflow","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.26.0+dfsg-4"}]}],"versions":["1.22.0+dfsg-7","1.23.0+dfsg-1","1.23.0+dfsg-2","1.24.0+dfsg-1","1.24.0+dfsg-2","1.25.0+dfsg-1","1.25.0+dfsg-2","1.25.0+dfsg-3","1.26.0+dfsg-1","1.26.0+dfsg-2","1.26.0+dfsg-3"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"deskflow","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.26.0+dfsg-1","1.26.0+dfsg-3","1.26.0+dfsg-5ubuntu1","1.27.0+dfsg-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"deskflow","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"]}],"products":[{"vendor":"deskflow","product":"deskflow"}],"references":[{"url":"https://github.com/deskflow/deskflow/security/advisories/GHSA-gmvh-3c73-m5gg","tags":["x_refsource_CONFIRM","exploit","advisory","report"]},{"url":"https://github.com/deskflow/deskflow/commit/8266fbbe6af93fa370018886c7f1f35d2cee8b3f","tags":["x_refsource_MISC","fix","report"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63409.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63409","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-63409","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-63409","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-63409","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-63409","title":"Deskflow: Odd-length DSOP options vector causes out-of-bounds read in Deskflow client","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.","status":"published","published":"2026-08-17T20:57:19.326Z","modified":"2026-08-18T15:18:00.706Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:19:55.914391Z"}],"euvd":[{"id":"EUVD-2026-60463","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.","status":"published","published":"2026-08-17T20:57:19Z","modified":"2026-08-18T15:18:00Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T18:01:46.405062Z"}],"nvd":[{"id":"CVE-2026-63409","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.","status":"published","published":"2026-08-17T21:16:46.2Z","modified":"2026-09-09T21:11:46.833Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:12:38.647684Z"}],"osv":[{"id":"CVE-2026-63409","title":"Deskflow: Odd-length DSOP options vector causes out-of-bounds read in Deskflow client","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.","status":"published","published":"2026-08-17T20:57:19.326Z","modified":"2026-10-28T11:17:05.671056977Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","level":"high"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:45:13.306117Z"},{"id":"DEBIAN-CVE-2026-63409","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.","status":"published","published":"2026-08-17T21:16:46.2Z","modified":"2026-10-01T03:03:29.268279321Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:57.932517Z"},{"id":"UBUNTU-CVE-2026-63409","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.","status":"published","published":"2026-08-17T21:16:00Z","modified":"2026-10-17T13:00:31.874659237Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T16:56:43.630667Z"}]}}