CVE-2026-12996CWE-125CWE-416

CVE-2026-12996

High · published July 30, 2026

CVSS v3.1

8.1

EPSS

Percentile

39.0

In the wild

Unconfirmed

What it is

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

The record

Technical detail

CVSS v3.1: 8.1 · HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CVSS v4.0: Not supplied
EPSS: 0.00461 · 39.0th percentile
Weaknesses: CWE-125 · Out-of-bounds Read; CWE-416 · Use After Free
Published: 2026-07-30T21:16Z

Affected products (3)

Product	Versions	Fixed in
openvpn/openvpn	≥ 2.6.0, < 2.6.21	2.6.21
openvpn/openvpn	≥ 2.7, < 2.7.5	2.7.5
debian/debian_linux	all versions	—

References (4)

https://community.openvpn.net/ReleaseHistory#openvpn-2621-released-1-july-2026 · [email protected]https://community.openvpn.net/ReleaseHistory#openvpn-275-released-1-july-2026 · [email protected]https://community.openvpn.net/Security%20Announcements/CVE-2026-12996 · [email protected]https://lists.debian.org/debian-lts-announce/2026/07/msg00013.html · af854a3a-2127-422b-91ae-364da2661108

EPSS history

Timeline

30 JUL 16:38Z
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…
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