CVE-2018-15126

Publication date 19 December 2018

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

LibVNC before commit 73cb96fec028a576a5a24417b57723b55854ad7b contains heap use-after-free vulnerability in server code of file transfer extension that can result remote code execution

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libvncserver	19.04 disco	Not affected
	18.10 cosmic	Fixed 0.9.11+dfsg-1.1ubuntu0.1
	18.04 LTS bionic	Fixed 0.9.11+dfsg-1ubuntu1.1
	16.04 LTS xenial	Fixed 0.9.10+dfsg-3ubuntu0.16.04.3
	14.04 LTS trusty	Fixed 0.9.9+dfsg-1ubuntu1.4
x11vnc	19.04 disco	Not affected
	18.10 cosmic	Ignored end of life
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
libvncserver	Upstream: 162d716

Severity score breakdown

Parameter	Value
Base score	9.8 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-3877-1
LibVNCServer vulnerabilities
31 January 2019