CVE-2026-40215

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Source
https://cve.org/CVERecord?id=CVE-2026-40215
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40215.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-40215
Downstream
Related
Published
2026-06-08T19:59:20Z
Modified
2026-08-13T09:42:02Z
Severity
  • 6.1 (Medium) CVSS_V4 - 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 CVSS Calculator
Summary
[none]
Details

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.

Database specific 
{
    "cna_assigner": "OpenVPN",
    "cwe_ids": [
        "CWE-125",
        "CWE-416"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40215.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "2.6.0"
                },
                {
                    "last_affected": "2.6.19"
                },
                {
                    "introduced": "2.7_alpha1"
                },
                {
                    "last_affected": "2.7.1"
                }
            ],
            "source": "AFFECTED_FIELD"
        },
        {
            "extracted_events": [
                {
                    "introduced": "2.6.0"
                },
                {
                    "fixed": "2.6.19"
                },
                {
                    "introduced": "2.7_alpha1"
                },
                {
                    "fixed": "2.7.1"
                }
            ],
            "source": "DESCRIPTION"
        }
    ]
}
References

Affected packages

Git / github.com/openvpn/openvpn

Affected ranges

Type
GIT
Repo
https://github.com/openvpn/openvpn
Events
Introduced
b999466418dddb89721be5455f03bacd9b221b1d
Fixed
8e87f2c34a0fbd64e282711582b106f84660e916
Introduced
ee1577744fb09af760dc319d57746e6abc55db85
Fixed
59748789497afcad90601d120fecd58cbc1423c4
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "2.6.0"
        },
        {
            "fixed": "2.6.20"
        },
        {
            "introduced": "2.7"
        },
        {
            "fixed": "2.7.2"
        }
    ],
    "source": "CPE_RANGE"
}

Affected versions

v2.*
v2.6.0
v2.6.1
v2.6.10
v2.6.11
v2.6.12
v2.6.13
v2.6.14
v2.6.15
v2.6.16
v2.6.17
v2.6.18
v2.6.19
v2.6.2
v2.6.3
v2.6.4
v2.6.5
v2.6.6
v2.6.7
v2.6.8
v2.6.9
v2.7.0
v2.7.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40215.json"