CVE-2026-40215
Received
Received - Intake
Race Condition in OpenVPN Leads to Server Crash or Memory Leak
Publication date: 2026-06-08
Last updated on: 2026-06-08
Assigner: OpenVPN Inc.
Description
Description
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 Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| openvpn | openvpn | From 2.6.0 (inc) to 2.6.19 (inc) |
| openvpn | openvpn | From 2.7_alpha1 (inc) to 2.7.1 (inc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-125 | The product reads data past the end, or before the beginning, of the intended buffer. |
| CWE-416 | The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. |