CVEvulnerability

CVE-2026-40215

6.1 MEDIUM Published 2026-06-08 Modified 2026-08-11 Official page ↗

Status: Analyzed
Published: 2026-06-08
Last modified: 2026-08-11
Assigner: [email protected]
CVSS 4.0 ([email protected]): 6.1 MEDIUM — CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:L/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1 ([email protected]): 7.4 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H
Weaknesses: CWE-125, CWE-416

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.

Affected configurations

• openvpn openvpn (>= 2.6.0 < 2.6.20) • openvpn openvpn (>= 2.7 < 2.7.2)

Weakness · CWE (2)

CWE-125 Out-of-bounds Read weakness
CWE-416 Use After Free weakness

References

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

CVE-2026-40215

Description

Affected configurations

Related

Weakness · CWE (2)

References