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
Published: 2026-07-30
Score: 6 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4666-1 openvpn security update
Debian DLA Debian DLA DLA-4653-2 openvpn regression update
Debian DSA Debian DSA DSA-6376-1 openvpn security update
Ubuntu USN Ubuntu USN USN-8540-1 OpenVPN vulnerabilities
History

Sat, 01 Aug 2026 00:15:00 +0000

Type Values Removed Values Added
Title OpenVPN: OpenVPN: Denial of Service or memory leak via crafted packets
Weaknesses CWE-825
References
Metrics threat_severity

None

cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H'}

threat_severity

Moderate


Fri, 31 Jul 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 30 Jul 2026 18:45:00 +0000

Type Values Removed Values Added
First Time appeared Openvpn
Openvpn openvpn
Vendors & Products Openvpn
Openvpn openvpn

Thu, 30 Jul 2026 17:00:00 +0000

Type Values Removed Values Added
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
Weaknesses CWE-125
CWE-416
References
Metrics cvssV4_0

{'score': 6, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: OpenVPN

Published:

Updated: 2026-07-30T18:07:17.597Z

Reserved: 2026-06-23T13:16:10.234Z

Link: CVE-2026-12996

cve-icon Vulnrichment

Updated: 2026-07-30T17:33:47.338Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-07-30T16:38:58Z

Links: CVE-2026-12996 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-02T05:15:15Z

Weaknesses