CVE-2026-40215

A race condition in OpenVPN 2.6.0 through 2.6.19 and 2.7_alpha1 through 2.7.1 allows remote attackers to potentially cause a server crash or leak heap memory via a use-after-free triggered during TLS session promotion.

CVSS v3 7.4 HIGH

7.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://community.openvpn.net/ReleaseHistory#openvpn-2620-released-22-april-2026	Release Notes
https://community.openvpn.net/ReleaseHistory#openvpn-272-released-22-april-2026	Release Notes
https://community.openvpn.net/Security%20Announcements/CVE-2026-40215	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:openvpn:openvpn::::::::
	cpe:2.3:a:openvpn:openvpn::::::::

History

No history.

Information

Published : 2026-06-08 21:16

Updated : 2026-08-11 13:06

NVD link : CVE-2026-40215

Mitre link : CVE-2026-40215

CVE.ORG link : CVE-2026-40215

JSON object : View

Products Affected

openvpn

openvpn

CWE

CWE-125

Out-of-bounds Read

CWE-416

Use After Free

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