CVE catalog
CVE-2026-12996
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
- Severity
- Medium · CVSS 6
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.46% · Oct 25, 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
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | openvpn | sid | 2.7.8-1 | fixed |
| Debian | openvpn | forky | 2.7.8-1 | fixed |
| Debian | openvpn | trixie | 2.6.14-1+deb13u3 | fixed |
| Debian | openvpn | trixie-security | 2.6.14-1+deb13u3 | fixed |
| Debian | openvpn | bookworm | 2.6.14-0+deb12u2 | fixed |
| Debian | openvpn | bookworm-security | 2.6.14-0+deb12u2 | fixed |
| Cpe | openvpn | Not reported | 2.6.14-0+deb12u2 | fixed |
| Cpe | openvpn | Not reported | 2.6.19-0ubuntu0.24.04.3 | fixed |
| Alpine | openvpn | 3.24 | 2.7.5-r0 | fixed |
| Ubuntu | openvpn | pro | 2.4.3-4ubuntu1 | vulnerable |
| Ubuntu | openvpn | pro | 2.4.4-1ubuntu1 | vulnerable |
| Ubuntu | openvpn | pro | 2.4.4-2ubuntu1 | vulnerable |
| Ubuntu | openvpn | pro | 2.4.4-2ubuntu1.1 | vulnerable |
| Ubuntu | openvpn | pro | 2.4.4-2ubuntu1.2 | vulnerable |
| Ubuntu | openvpn | pro | 2.4.4-2ubuntu1.3 | vulnerable |
| Ubuntu | openvpn | pro | 2.4.4-2ubuntu1.5 | vulnerable |
| Ubuntu | openvpn | pro | 2.4.4-2ubuntu1.6 | vulnerable |
| Ubuntu | openvpn | pro | 2.4.4-2ubuntu1.7 | vulnerable |
| Ubuntu | openvpn | pro | 2.4.4-2ubuntu1.7+esm1 | vulnerable |
| Ubuntu | openvpn | 20.04 | 2.4.7-1ubuntu2 | vulnerable |
| Ubuntu | openvpn | 20.04 | 2.4.7-1ubuntu2.20.04.2 | vulnerable |
| Ubuntu | openvpn | 20.04 | 2.4.7-1ubuntu2.20.04.3 | vulnerable |
| Ubuntu | openvpn | 20.04 | 2.4.7-1ubuntu2.20.04.4 | vulnerable |
| Ubuntu | openvpn | 20.04 | 2.4.12-0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | openvpn | 20.04 | 2.4.12-0ubuntu0.20.04.2 | vulnerable |
| Ubuntu | openvpn | 22.04 | 2.5.1-3ubuntu1 | vulnerable |
| Ubuntu | openvpn | 22.04 | 2.5.1-3ubuntu2 | vulnerable |
| Ubuntu | openvpn | 22.04 | 2.5.1-3ubuntu4 | vulnerable |
| Ubuntu | openvpn | 22.04 | 2.5.1-3ubuntu5 | vulnerable |
| Ubuntu | openvpn | 22.04 | 2.5.5-1ubuntu1 | vulnerable |
| Ubuntu | openvpn | 22.04 | 2.5.5-1ubuntu3 | vulnerable |
| Ubuntu | openvpn | 22.04 | 2.5.5-1ubuntu3.1 | vulnerable |
| Ubuntu | openvpn | 22.04 | 2.5.9-0ubuntu0.22.04.2 | vulnerable |
| Ubuntu | openvpn | 22.04 | 2.5.9-0ubuntu0.22.04.3 | vulnerable |
| Ubuntu | openvpn | 22.04 | 2.5.11-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | openvpn | 22.04 | 2.5.11-0ubuntu0.22.04.3 | vulnerable |
| Ubuntu | openvpn | 22.04 | 2.5.11-0ubuntu0.22.04.4 | fixed |
| Ubuntu | openvpn | 24.04 | 2.6.5-0ubuntu1 | vulnerable |
| Ubuntu | openvpn | 24.04 | 2.6.7-1ubuntu1 | vulnerable |
| Ubuntu | openvpn | 24.04 | 2.6.9-1ubuntu2 | vulnerable |
| Ubuntu | openvpn | 24.04 | 2.6.9-1ubuntu3 | vulnerable |
| Ubuntu | openvpn | 24.04 | 2.6.9-1ubuntu4 | vulnerable |
| Ubuntu | openvpn | 24.04 | 2.6.9-1ubuntu4.1 | vulnerable |
| Ubuntu | openvpn | 24.04 | 2.6.12-0ubuntu0.24.04.1 | vulnerable |
| Ubuntu | openvpn | 24.04 | 2.6.12-0ubuntu0.24.04.3 | vulnerable |
| Ubuntu | openvpn | 24.04 | 2.6.14-0ubuntu0.24.04.1 | vulnerable |
| Ubuntu | openvpn | 24.04 | 2.6.14-0ubuntu0.24.04.2 | vulnerable |
| Ubuntu | openvpn | 24.04 | 2.6.14-0ubuntu0.24.04.3 | vulnerable |
| Ubuntu | openvpn | 24.04 | 2.6.19-0ubuntu0.24.04.1 | vulnerable |
| Ubuntu | openvpn | 24.04 | 2.6.19-0ubuntu0.24.04.2 | vulnerable |
| Ubuntu | openvpn | 24.04 | 2.6.19-0ubuntu0.24.04.3 | fixed |
| Ubuntu | openvpn | 25.10 | 2.6.13-1ubuntu3 | vulnerable |
| Ubuntu | openvpn | 25.10 | 2.6.14-1ubuntu1 | vulnerable |
| Ubuntu | openvpn | 25.10 | 2.6.14-2ubuntu1 | vulnerable |
| Ubuntu | openvpn | 25.10 | 2.6.14-2ubuntu1.1 | vulnerable |
| Ubuntu | openvpn | 25.10 | 2.6.19-0ubuntu0.25.10.1 | vulnerable |
| Ubuntu | openvpn | 25.10 | 2.6.19-0ubuntu0.25.10.2 | vulnerable |
| Ubuntu | openvpn | 26.04 | 2.6.14-2ubuntu1 | vulnerable |
| Ubuntu | openvpn | 26.04 | 2.6.15-1ubuntu1 | vulnerable |
| Ubuntu | openvpn | 26.04 | 2.7.0~rc5-1ubuntu5 | vulnerable |
| Ubuntu | openvpn | 26.04 | 2.7.0~rc6-1ubuntu1 | vulnerable |
| Ubuntu | openvpn | 26.04 | 2.7.0-1ubuntu1 | vulnerable |
| Ubuntu | openvpn | 26.04 | 2.7.0-1ubuntu1.1 | vulnerable |
| Ubuntu | openvpn | 26.04 | 2.7.0-1ubuntu1.2 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | openvpn | source | sid | 2.7.5-1 | not yet assigned | Not reported | Not reported |
| Debian | openvpn | source | forky | 2.7.5-1 | not yet assigned | Not reported | Not reported |
| Debian | openvpn | source | trixie | 2.6.14-1+deb13u3 | not yet assigned | Not reported | Not reported |
| Debian | openvpn | source | bookworm | 2.6.14-0+deb12u2 | not yet assigned | Not reported | Not reported |
| Cpe | openvpn | cpe | Not reported | 2.6.14-0+deb12u2 | Not reported | Not reported | Not reported |
| Cpe | openvpn | cpe | Not reported | 2.6.19-0ubuntu0.24.04.3 | Not reported | Not reported | Not reported |
| Alpine | openvpn | apk | 3.24 | 2.7.5-r0 | Not reported | ALPINE-CVE-2026-12996 | Not reported |
| Ubuntu | openvpn | deb | 22.04 | 2.5.11-0ubuntu0.22.04.4 | Not reported | UBUNTU-CVE-2026-12996 | Not reported |
| Ubuntu | openvpn | deb | 24.04 | 2.6.19-0ubuntu0.24.04.3 | Not reported | UBUNTU-CVE-2026-12996 | Not reported |
| Ubuntu | openvpn | deb | 26.04 | 2.7.0-1ubuntu1.2 | Not reported | UBUNTU-CVE-2026-12996 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [openvpn]Fixed
Details (4)
2.6.14-0+deb12u2· amd64 · bookwormFixed · Fixed:
2.6.14-0+deb12u2nvd · openvpn · debian · bookworm; nvd · openvpn · debian · 12
2.6.14-0+deb12u2· arm64 · bookwormFixed · Fixed:
2.6.14-0+deb12u2nvd · openvpn · debian · bookworm; nvd · openvpn · debian · 12
2.6.14-0+deb12u2· amd64 · bookworm-securityFixed · Fixed:
2.6.14-0+deb12u2nvd · openvpn · debian · bookworm; nvd · openvpn · debian · 12
2.6.14-0+deb12u2· arm64 · bookworm-securityFixed · Fixed:
2.6.14-0+deb12u2nvd · openvpn · debian · bookworm; nvd · openvpn · debian · 12
[Debian 13 (Trixie)]
- [openvpn]Fixed
Details (6)
2.6.14-1+deb13u3· amd64 · trixieFixed · Fixed:
2.6.14-1+deb13u3nvd · openvpn · debian · 13
2.6.14-1+deb13u3· arm64 · trixieFixed · Fixed:
2.6.14-1+deb13u3nvd · openvpn · debian · 13
2.7.5-1~bpo13+1· amd64 · trixie-backportsFixed · Fixed:
2.6.14-1+deb13u3nvd · openvpn · debian · 13
2.7.5-1~bpo13+1· arm64 · trixie-backportsFixed · Fixed:
2.6.14-1+deb13u3nvd · openvpn · debian · 13
2.6.14-1+deb13u3· amd64 · trixie-securityFixed · Fixed:
2.6.14-1+deb13u3nvd · openvpn · debian · 13
2.6.14-1+deb13u3· arm64 · trixie-securityFixed · Fixed:
2.6.14-1+deb13u3nvd · openvpn · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_3596-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-12996]
- [https://osv.dev/vulnerability/ALPINE-CVE-2026-12996]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-12996]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-12996]
- [https://security-tracker.debian.org/tracker/CVE-2026-12996]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12996.json]
- [https://ubuntu.com/security/notices/USN-8540-1]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2197.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]