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CVE-2026-84732

CVE-2026-84732

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

Retransmissions of ACK packet ID in OpenVPN through 2.6.22 and 2.7.6 allow remote unauthenticated attackers to cause a denial of service via crafted inputs that trigger a timeout integer overflow

CVSS 8.7 · High · EPSS 0.3% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • openvpn

    Versions
    • ≥ 0, ≤ 2.6.22: Affected (semver)
    • ≥ 0, ≤ 2.7.6: 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
    • 2.6.14-0+deb12u2
    • 2.6.14-1
    • 2.6.14-2
    • 2.6.15-1
    • 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
    • 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
    • 2.7.5-1~bpo13+1
    • 2.7.7-1
    • 2.7.7-1~bpo13+1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • openvpn Debian:13

    Versions
    • 2.6.14-1
    • 2.6.14-1+deb13u1
    • 2.6.14-1+deb13u2
    • 2.6.14-1+deb13u3
    • 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
    • 2.7.5-1~bpo13+1
    • 2.7.7-1
    • 2.7.7-1~bpo13+1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • 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
    • 2.7.5-1~bpo13+1
    • 2.7.7-1~bpo13+1
    Affected ranges
    • ECOSYSTEM: < 2.7.7-1

    Update to 2.7.7-1

  • 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
    • 2.5.11-0ubuntu0.22.04.4
    Affected ranges
    • ECOSYSTEM: < 2.5.11-0ubuntu0.22.04.5

    Update to 2.5.11-0ubuntu0.22.04.5

  • 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
    • 2.6.19-0ubuntu0.24.04.3
    Affected ranges
    • ECOSYSTEM: < 2.6.19-0ubuntu0.24.04.4

    Update to 2.6.19-0ubuntu0.24.04.4

  • 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
    • 2.7.0-1ubuntu1.2
    Affected ranges
    • ECOSYSTEM: < 2.7.0-1ubuntu1.3

    Update to 2.7.0-1ubuntu1.3

Original sources

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