EUVD-2026-17907CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
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Description
A flaw was found in libinput. A local attacker who can place a specially crafted Lua bytecode file in certain system or user configuration directories can bypass security restrictions. This allows the attacker to run unauthorized code with the same permissions as the program using libinput, such as a graphical compositor. This could lead to the attacker monitoring keyboard input and sending that information to an external location.
Analysis
Local privilege escalation in libinput allows authenticated users to execute arbitrary code within graphical compositor contexts by placing malicious Lua bytecode in system or user configuration directories. The vulnerability achieves scope change (CVSS:S:C) with high impact across confidentiality, integrity, and availability (8.8 CVSS), enabling attackers to monitor keyboard input including passwords and sensitive data. …
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Remediation
Within 24 hours: Inventory all systems running libinput (check via 'pkg-config --modversion libinput' on Linux desktops and servers; review application dependencies). Audit configuration directory permissions on /etc/libinput* and user ~/.config/libinput* to restrict write access to root/trusted users only. …
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