Use-After-Free Vulnerability in OpenVPN by OpenVPN Technologies
CVE-2026-12996

6MEDIUM

Key Information:

Vendor

Openvpn
Status
Openvpn
Vendor
CVE Published:
30 July 2026

What is CVE-2026-12996?

A use-after-free vulnerability exists in versions 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 of OpenVPN. This flaw could allow remote authenticated peers to exploit crafted packets during the promotion or expiry of TLS sessions, potentially leading to a denial-of-service condition or memory leakage. It is essential for users of affected versions to apply the necessary patches to safeguard against this vulnerability.

Affected Version(s)

OpenVPN 2.6.0 <= 2.6.20

OpenVPN 2.7_alpha1 <= 2.7.4

References

https://community.openvpn.net/Security%20Announcements/CV...
vendor-advisory
https://community.openvpn.net/ReleaseHistory#openvpn-275-...
release-notes
https://community.openvpn.net/ReleaseHistory#openvpn-2621...
release-notes

CVSS V4

Score:
6
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.