CVE-2026-40215
6.1
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
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| OpenVPN | OpenVPN | 2.6.0 <= 2.6.19 | affected |
| OpenVPN | OpenVPN | 2.7_alpha1 <= 2.7.1 | affected |
Weaknesses
- CWE-125: CWE-125 Out-of-bounds read
- CWE-416: CWE-416 Use after free
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
- https://community.openvpn.net/Security%20Announcements/CVE-2026-40215
- https://community.openvpn.net/ReleaseHistory#openvpn-272-released-22-april-2026
- https://community.openvpn.net/ReleaseHistory#openvpn-2620-released-22-april-2026
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