Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 25.5%
CVSS Severity
CVSS v3 Score 7.4
References
Products affected by CVE-2026-40215
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cpe:2.3:a:openvpn:openvpn:2.6.0
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cpe:2.3:a:openvpn:openvpn:2.6.1
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cpe:2.3:a:openvpn:openvpn:2.6.10
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cpe:2.3:a:openvpn:openvpn:2.6.11
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cpe:2.3:a:openvpn:openvpn:2.6.12
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cpe:2.3:a:openvpn:openvpn:2.6.13
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cpe:2.3:a:openvpn:openvpn:2.6.14
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cpe:2.3:a:openvpn:openvpn:2.6.15
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cpe:2.3:a:openvpn:openvpn:2.6.16
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cpe:2.3:a:openvpn:openvpn:2.6.17
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cpe:2.3:a:openvpn:openvpn:2.6.18
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cpe:2.3:a:openvpn:openvpn:2.6.19
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cpe:2.3:a:openvpn:openvpn:2.6.2
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cpe:2.3:a:openvpn:openvpn:2.6.3
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cpe:2.3:a:openvpn:openvpn:2.6.4
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cpe:2.3:a:openvpn:openvpn:2.6.5
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cpe:2.3:a:openvpn:openvpn:2.6.6
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cpe:2.3:a:openvpn:openvpn:2.6.7
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cpe:2.3:a:openvpn:openvpn:2.6.8
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cpe:2.3:a:openvpn:openvpn:2.6.9
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cpe:2.3:a:openvpn:openvpn:2.7
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cpe:2.3:a:openvpn:openvpn:2.7.0
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cpe:2.3:a:openvpn:openvpn:2.7.1