CVE-2020-27827

Publication date 13 January 2021

Last updated 11 July 2025

Ubuntu priority

Cvss 3 Severity Score

Description

A flaw was found in multiple versions of OpenvSwitch. Specially crafted LLDP packets can cause memory to be lost when allocating data to handle specific optional TLVs, potentially causing a denial of service. The highest threat from this vulnerability is to system availability.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
lldpd	25.10 questing	Needs evaluation
	25.04 plucky	Needs evaluation
	24.10 oracular	Ignored end of life, was needs-triage
	24.04 LTS noble	Needs evaluation
	23.10 mantic	Ignored end of life, was needs-triage
	23.04 lunar	Ignored end of life, was needs-triage
	22.10 kinetic	Ignored end of life, was needs-triage
	22.04 LTS jammy	Needs evaluation
	21.10 impish	Ignored end of life
	21.04 hirsute	Ignored end of life
	20.10 groovy	Ignored end of life
	20.04 LTS focal	Needs evaluation
	18.04 LTS bionic	Needs evaluation
	16.04 LTS xenial	Needs evaluation
	14.04 LTS trusty	Not in release
openvswitch	25.10 questing	Fixed 2.15.0-0ubuntu1
	25.04 plucky	Fixed 2.15.0-0ubuntu1
	24.10 oracular	Fixed 2.15.0-0ubuntu1
	24.04 LTS noble	Fixed 2.15.0-0ubuntu1
	23.10 mantic	Fixed 2.15.0-0ubuntu1
	23.04 lunar	Fixed 2.15.0-0ubuntu1
	22.10 kinetic	Fixed 2.15.0-0ubuntu1
	22.04 LTS jammy	Fixed 2.15.0-0ubuntu1
	21.10 impish	Fixed 2.15.0-0ubuntu1
	21.04 hirsute	Fixed 2.15.0-0ubuntu1
	20.10 groovy	Fixed 2.13.1-0ubuntu1.2
	20.04 LTS focal	Fixed 2.13.1-0ubuntu0.20.04.3
	18.04 LTS bionic	Fixed 2.9.7-0ubuntu0.18.04.2
	16.04 LTS xenial	Fixed 2.5.9-0ubuntu0.16.04.2
	14.04 LTS trusty	Not in release

Patch details

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

Package	Patch details
lldpd	Upstream: 7d60bf3

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-4691-1
Open vSwitch vulnerabilities
13 January 2021