CVE-2018-20021

libvncserver: Infinite loop in VNC client code allows for denial of service

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Severity

Low

Red Hat Product Security

6.5

CVSS 3.0

Review impact separately from score.

Published · December 19, 2018

Updated · November 22, 2025

Description

LibVNC before commit c3115350eb8bb635d0fdb4dbbb0d0541f38ed19c contains a CWE-835: Infinite loop vulnerability in VNC client code. Vulnerability allows attacker to consume excessive amount of resources like CPU and RAM

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 6.5
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CWE-400 · Uncontrolled Resource Consumption