Vulnerability DatabaseCVE-2026-12996
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CVE-2026-12996
Published:July 30, 2026
Updated:August 06, 2026
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
Affected Packages
https://github.com/OpenVPN/openvpn.git (GITHUB):
Affected version(s) >=v2.6.0 <v2.6.21
Fix Suggestion:
Update to version v2.6.21
https://github.com/OpenVPN/openvpn.git (GITHUB):
Affected version(s) >=v2.7_alpha1 <v2.7.5
Fix Suggestion:
Update to version v2.7.5
Related Resources (4)
https://community.openvpn.net/ReleaseHistory#openvpn-275-released-1-july-2026
https://lists.debian.org/debian-lts-announce/2026/07/msg00013.html
https://community.openvpn.net/Security%20Announcements/CVE-2026-12996
https://community.openvpn.net/ReleaseHistory#openvpn-2621-released-1-july-2026
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CVSS v4
Base Score:
6
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
PRESENT
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Out-of-bounds Read
CWE-125
Use After Free
CWE-416
EPSS
Base Score:
0.40