Vulnerability Description
A use-after-free in OpenVPN 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote authenticated peers to potentially cause a denial of service or leak memory via crafted packets during TLS session promotion or expiry
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openvpn | Openvpn | >= 2.6.0, < 2.6.21 |
| Debian | Debian Linux | 11.0 |
Related Weaknesses (CWE)
References
- https://community.openvpn.net/ReleaseHistory#openvpn-2621-released-1-july-2026Release Notes
- https://community.openvpn.net/ReleaseHistory#openvpn-275-released-1-july-2026Release Notes
- https://community.openvpn.net/Security%20Announcements/CVE-2026-12996Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2026/07/msg00013.htmlMailing ListThird Party Advisory
FAQ
What is CVE-2026-12996?
CVE-2026-12996 is a vulnerability with a CVSS score of 8.1 (HIGH). A use-after-free in OpenVPN 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote authenticated peers to potentially cause a denial of service or leak memory via crafted packets during TLS s...
How severe is CVE-2026-12996?
CVE-2026-12996 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-12996?
Check the references section above for vendor advisories and patch information. Affected products include: Openvpn Openvpn, Debian Debian Linux.