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CVE-2018-20020

libvncserver: Heap out-of-bound write inside structure in VNC client code allows for potential code execution

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Severity

Moderate

Red Hat Product Security

8.8

CVSS 3.0

Review impact separately from score.

Published · December 19, 2018

Updated · November 22, 2025

Description

LibVNC before commit 7b1ef0ffc4815cab9a96c7278394152bdc89dc4d contains heap out-of-bound write vulnerability inside structure in VNC client code that can result remote code execution

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 · 8.8
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE-416 · Use After Free