CVE-2021-34557

MediumCVSS 4.6/10Last modified Jun 17, 2026

Description

XScreenSaver 5.45 can be bypassed if the machine has more than ten disconnectable video outputs. A buffer overflow in update_screen_layout() allows an attacker to bypass the standard screen lock authentication mechanism by crashing XScreenSaver. The attacker must physically disconnect many video outputs.

Metrics

CVSS 3.1 4.6/10CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-120

Affected software

No affected versions have been published.

Timeline

Published: Jun 10, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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