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OpenAdvisories
High · 8.2 CVE-2026-65832 EUVD-2026-60464

Deskflow - Unauthenticated server-controlled out-of-bounds read in ServerProxy::setOptions / translateKey modifier-table indexing

Published Aug 17, 2026 · Updated Aug 18, 2026 · Assigned by GitHub_M

Description

Deskflow is a keyboard and mouse sharing app. Prior to continuous build 1.26.0.299, a remote unauthenticated Deskflow server can send kMsgDSetOptions (DSOP) values to ServerProxy::setOptions() in src/lib/client/ServerProxy.cpp so that the value following a modifier option poisons m_modifierTranslationTable, after which ServerProxy::translateKey() or ServerProxy::translateModifierMask() indexes the seven-row s_translationTable or s_masks arrays out of bounds, disclosing four bytes at an attacker-selected relative offset or crashing the connected client; an odd option count also causes an out-of-bounds OptionsList read. This issue is fixed in continuous build 1.26.0.299.

Affected products

VendorProductAffectedFixed
deskflow deskflow < 1.26.0.299 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 deskflow 1.26.0+dfsg-4 —
Debian 13 deskflow No fix yet —
ReleasePackageFixed inAdvisory
Ubuntu 26.10 deskflow No fix yet —
Ubuntu 26.04 LTS deskflow No fix yet —

References