CVE-2026-40215_CVE-2026-40215

6.1 / 10

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

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.

Basic Information

ID CVE-2026-40215

Source OpenVPN

Published Jun 8, 2026 at 19:59

Affected Product

Vendor OpenVPN

Product OpenVPN

Version 2.6.0

Affected Versions OpenVPN OpenVPN 2.6.0
OpenVPN OpenVPN 2.7_alpha1

CWE Classification

CWE-125 CWE-416

References

{
    "lastseen": "",
    "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.",
    "published": "2026-06-08T19:59:20.481Z",
    "modified": "2026-06-08T19:59:20.481Z",
    "type": "cve",
    "title": "CVE-2026-40215",
    "source": "OpenVPN",
    "references": "https://community.openvpn.net/Security%20Announcements/CVE-2026-40215\nhttps://community.openvpn.net/ReleaseHistory#openvpn-272-released-22-april-2026\nhttps://community.openvpn.net/ReleaseHistory#openvpn-2620-released-22-april-2026",
    "id": "CVE-2026-40215",
    "bulletinFamily": "",
    "cwe": [
        "CWE-125",
        "CWE-416"
    ],
    "cvelist": null,
    "sourceData": "OpenVPN OpenVPN 2.6.0\nOpenVPN OpenVPN 2.7_alpha1",
    "sourceHref": "",
    "cvss": {
        "score": 6.1,
        "severity": "MEDIUM",
        "vector": "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",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "OpenVPN",
    "version": "2.6.0",
    "vendor": "OpenVPN",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}