CVE-2021-36980

Publication date 20 July 2021

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Open vSwitch (aka openvswitch) 2.11.0 through 2.15.0 has a use-after-free in decode_NXAST_RAW_ENCAP (called from ofpact_decode and ofpacts_decode) during the decoding of a RAW_ENCAP action.

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	Not affected
	21.04 hirsute	Fixed 2.15.0-0ubuntu3.1
	20.10 groovy	Ignored end of life
	20.04 LTS focal	Fixed 2.13.3-0ubuntu0.20.04.2
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release

Notes

mdeslaur

per Google, this was introduced in 418a7a84245f5fbe589dd1267463fc9ba27a1dd6

Patch details

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

Package	Patch details
openvswitch	Upstream: 38744b1 Upstream: 65c61b0 Upstream: 6d67310 Upstream: 77cccc7 Upstream: 8ce8dc3 Upstream: 9926637

Severity score breakdown

Parameter	Value
Base score	5.5 · Medium
Attack vector	Local
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-5065-1
Open vSwitch vulnerability
8 September 2021