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CVE-2026-12996

CVE-2026-12996

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 6.0 · Medium · EPSS 0.5% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • openvpn

    Versions
    • ≥ 2.6.0, ≤ 2.6.20: Affected (semver)
    • ≥ 2.7_alpha1, ≤ 2.7.4: Affected (semver)

    No fix published

  • openvpn Debian:12

    Versions
    • 2.6.11-1
    • 2.6.12-1
    • 2.6.13-1
    • 2.6.14-0+deb12u1
    • 2.6.3-1
    • 2.6.3-1+deb12u1
    • 2.6.3-1+deb12u1~bpo11+1
    • 2.6.3-1+deb12u2
    • 2.6.3-1+deb12u2~bpo11+1
    • 2.6.3-1+deb12u3
    • 2.6.3-1+deb12u4
    • 2.6.3-2
    • 2.6.3-2.1
    • 2.6.7-1
    • 2.6.9-1
    Affected ranges
    • ECOSYSTEM: < 2.6.14-0+deb12u2

    Update to 2.6.14-0+deb12u2

  • openvpn Debian:13

    Versions
    • 2.6.14-1
    • 2.6.14-1+deb13u1
    • 2.6.14-1+deb13u2
    Affected ranges
    • ECOSYSTEM: < 2.6.14-1+deb13u3

    Update to 2.6.14-1+deb13u3

  • openvpn Debian:14

    Versions
    • 2.6.14-1
    • 2.6.14-2
    • 2.6.15-1
    • 2.7.0-1
    • 2.7.0-1~bpo13+1
    • 2.7.0~alpha1-1
    • 2.7.0~alpha2-1
    • 2.7.0~alpha3-1
    • 2.7.0~beta1-1
    • 2.7.0~beta2-1
    • 2.7.0~beta3-1
    • 2.7.0~rc1-1
    • 2.7.0~rc2-1
    • 2.7.0~rc2-2
    • 2.7.0~rc3-1
    • 2.7.0~rc4-1
    • 2.7.0~rc5-1
    • 2.7.0~rc6-1
    • 2.7.1-1
    • 2.7.1-1~bpo13+1
    • 2.7.2-1
    • 2.7.2-1~bpo13+1
    • 2.7.3-1
    • 2.7.5-1~bpo13+1
    Affected ranges
    • ECOSYSTEM: < 2.7.5-1

    Update to 2.7.5-1

  • openvpn Ubuntu:Pro:14.04:LTS

    Versions
    • 2.3.2-4ubuntu1
    • 2.3.2-5ubuntu1
    • 2.3.2-7ubuntu1
    • 2.3.2-7ubuntu2
    • 2.3.2-7ubuntu3
    • 2.3.2-7ubuntu3.1
    • 2.3.2-7ubuntu3.2
    • 2.3.2-7ubuntu3.2+esm1
    • 2.3.2-7ubuntu3.2+esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • openvpn Ubuntu:Pro:16.04:LTS

    Versions
    • 2.3.7-1ubuntu1
    • 2.3.7-2ubuntu1
    • 2.3.8-1ubuntu1
    • 2.3.10-1ubuntu1
    • 2.3.10-1ubuntu2
    • 2.3.10-1ubuntu2.1
    • 2.3.10-1ubuntu2.2
    • 2.3.10-1ubuntu2.2+esm1
    • 2.3.10-1ubuntu2.2+esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • openvpn Ubuntu:Pro:18.04:LTS

    Versions
    • 2.4.3-4ubuntu1
    • 2.4.4-1ubuntu1
    • 2.4.4-2ubuntu1
    • 2.4.4-2ubuntu1.1
    • 2.4.4-2ubuntu1.2
    • 2.4.4-2ubuntu1.3
    • 2.4.4-2ubuntu1.5
    • 2.4.4-2ubuntu1.6
    • 2.4.4-2ubuntu1.7
    • 2.4.4-2ubuntu1.7+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • openvpn Ubuntu:20.04:LTS

    Versions
    • 2.4.7-1ubuntu2
    • 2.4.7-1ubuntu2.20.04.2
    • 2.4.7-1ubuntu2.20.04.3
    • 2.4.7-1ubuntu2.20.04.4
    • 2.4.12-0ubuntu0.20.04.1
    • 2.4.12-0ubuntu0.20.04.2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • openvpn Ubuntu:22.04:LTS

    Versions
    • 2.5.1-3ubuntu1
    • 2.5.1-3ubuntu2
    • 2.5.1-3ubuntu4
    • 2.5.1-3ubuntu5
    • 2.5.5-1ubuntu1
    • 2.5.5-1ubuntu3
    • 2.5.5-1ubuntu3.1
    • 2.5.9-0ubuntu0.22.04.2
    • 2.5.9-0ubuntu0.22.04.3
    • 2.5.11-0ubuntu0.22.04.1
    • 2.5.11-0ubuntu0.22.04.3
    Affected ranges
    • ECOSYSTEM: < 2.5.11-0ubuntu0.22.04.4

    Update to 2.5.11-0ubuntu0.22.04.4

  • openvpn Ubuntu:24.04:LTS

    Versions
    • 2.6.5-0ubuntu1
    • 2.6.7-1ubuntu1
    • 2.6.9-1ubuntu2
    • 2.6.9-1ubuntu3
    • 2.6.9-1ubuntu4
    • 2.6.9-1ubuntu4.1
    • 2.6.12-0ubuntu0.24.04.1
    • 2.6.12-0ubuntu0.24.04.3
    • 2.6.14-0ubuntu0.24.04.1
    • 2.6.14-0ubuntu0.24.04.2
    • 2.6.14-0ubuntu0.24.04.3
    • 2.6.19-0ubuntu0.24.04.1
    • 2.6.19-0ubuntu0.24.04.2
    Affected ranges
    • ECOSYSTEM: < 2.6.19-0ubuntu0.24.04.3

    Update to 2.6.19-0ubuntu0.24.04.3

  • openvpn Ubuntu:25.10

    Versions
    • 2.6.13-1ubuntu3
    • 2.6.14-1ubuntu1
    • 2.6.14-2ubuntu1
    • 2.6.14-2ubuntu1.1
    • 2.6.19-0ubuntu0.25.10.1
    • 2.6.19-0ubuntu0.25.10.2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • openvpn Ubuntu:26.04:LTS

    Versions
    • 2.6.14-2ubuntu1
    • 2.6.15-1ubuntu1
    • 2.7.0~rc5-1ubuntu5
    • 2.7.0~rc6-1ubuntu1
    • 2.7.0-1ubuntu1
    • 2.7.0-1ubuntu1.1
    Affected ranges
    • ECOSYSTEM: < 2.7.0-1ubuntu1.2

    Update to 2.7.0-1ubuntu1.2

Original sources

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