CVE-2021-3905

Publication date 8 November 2021

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

A memory leak was found in Open vSwitch (OVS) during userspace IP fragmentation processing. An attacker could use this flaw to potentially exhaust available memory by keeping sending packet fragments.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
openvswitch	22.04 LTS jammy	Not affected
	21.10 impish	Fixed 2.16.0-0ubuntu2.1
	21.04 hirsute	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Ignored end of standard support

Notes

mdeslaur

introduced by https://github.com/openvswitch/ovs/commit/640d4db788eda96bb904abcfc7de2327107bafe1

Patch details

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

Package	Patch details
openvswitch	Upstream: 803ed12

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