#VU121033 Execution with unnecessary privileges in lightdm-gtk-greeter - CVE-2025-62876

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Main Vulnerability Database Vulnerabilities #VU121033

#VU121033 Execution with unnecessary privileges in lightdm-gtk-greeter - CVE-2025-62876

Published: January 7, 2026


Vulnerability identifier: #VU121033
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-62876
CWE-ID: CWE-250
Exploitation vector: Local access
Exploit availability: No public exploit available
Vulnerable software:
lightdm-gtk-greeter
Software vendor:
KDE.org

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to application uses the KAuth helper to copy a background image is copied to the service user home directory. A local user can create a symbolic link into its home directory and copy the file to a arbitrary location with root privileges. 


Remediation

Install updates from vendor's website.

External links