# CVE-2026-84732: openvpn: Retransmissions of ACK packet ID in OpenVPN through 2.6.22 and 2.7.6 allow remote unauthenticated attackers to cause...

CVE-2026-84732 is fixed in 2 products on 1 platform, first by openvpn 2.7.0-1ubuntu1.3, released September 7, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-84732
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0034
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 7, 2026

## Description

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

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | openvpn Debian 14 | 2.7.7-1 | [DEBIAN-CVE-2026-84732](https://patchblox.com/security/data/fix/linux/debian-cve-2026-84732.md) | Sep 10, 2026 |
| Linux | openvpn Ubuntu 22.04.1 LTS (jammy) | 2.5.11-0ubuntu0.22.04.5 | [openvpn 2.5.11-0ubuntu0.22.04.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-openvpn-2.5.11-0ubuntu0.22.04.5.md) | Oct 1, 2026 |
| Linux | openvpn Ubuntu 24.04.5 LTS (noble) | 2.6.19-0ubuntu0.24.04.4 | [openvpn 2.6.19-0ubuntu0.24.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-noble-openvpn-2.6.19-0ubuntu0.24.04.4.md) | Oct 1, 2026 |
| Linux | openvpn Ubuntu 26.04.1 LTS (resolute) | 2.7.0-1ubuntu1.3 | [openvpn 2.7.0-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-openvpn-2.7.0-1ubuntu1.3.md) | Sep 7, 2026 |
| Linux | openvpn opensuse-leap 16.0 | 2.6.10-160000.5.1 | [OPENSUSE-SU-2026:22072-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22072-1.md) | Nov 7, 2026 |
| Linux | openvpn sles 15.6 | 2.6.10-150600.3.37.1 | [SUSE-SU-2026:4213-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4213-1.md) | Sep 16, 2026 |
| Linux | openvpn sles 15.7 | 2.6.10-150600.3.37.1 | [SUSE-SU-2026:4213-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4213-1.md) | Sep 16, 2026 |
| Linux | openvpn sles 16.0 | 2.6.10-160000.5.1 | [SUSE-SU-2026:24220-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-24220-1.md) | Nov 7, 2026 |
| Linux | openvpn-dco sles 15.6 | 2.6.10-150600.3.37.1 | [SUSE-SU-2026:4213-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4213-1.md) | Sep 16, 2026 |
| Linux | openvpn-dco sles 15.7 | 2.6.10-150600.3.37.1 | [SUSE-SU-2026:4213-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4213-1.md) | Sep 16, 2026 |

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Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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