CVE-2019-3840

Publication date 27 February 2019

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

6.3 · Medium

Score breakdown

Description

A NULL pointer dereference flaw was discovered in libvirt before version 5.0.0 in the way it gets interface information through the QEMU agent. An attacker in a guest VM can use this flaw to crash libvirtd and cause a denial of service.

Read the notes from the security team

Status

Package Ubuntu Release Status
libvirt 18.10 cosmic
Fixed 4.6.0-2ubuntu3.4
18.04 LTS bionic
Fixed 4.0.0-1ubuntu8.8
16.04 LTS xenial
Fixed 1.3.1-1ubuntu10.25
14.04 LTS trusty
Not affected

Notes

mdeslaur

introduced in 1.2.14

Patch details

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

Package Patch details
libvirt

Severity score breakdown

Parameter Value
Base score 6.3 · Medium
Attack vector Network
Attack complexity High
Privileges required Low
User interaction None
Scope Changed
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

Other references