CVE-2023-46850

Publication date 15 November 2023

Last updated 26 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote execution when sending network buffers to a remote peer.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
openvpn	23.10 mantic	Fixed 2.6.5-0ubuntu1.1
	23.04 lunar	Fixed 2.6.1-1ubuntu1.1
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected

Notes

mdeslaur

2.6.0+ only

Patch details

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

Package	Patch details
openvpn	Upstream: 57a5cd1

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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-6484-1
OpenVPN vulnerabilities
16 November 2023