Description
Improper validation of source IP addresses in OpenVPN version 2.6.0 through 2.6.15 and 2.7_alpha1 through 2.7_rc1 allows an attacker to open a session from a different IP address which did not initiate the connection resulting in a denial of service for the originating client
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenVPN | OpenVPN | 2.6.0 – ≤ 2.6.15, 2.7_alpha1 – ≤ 2.7_rc1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | openvpn | 2.7.0~rc2-2 | — |
| Debian 13 | openvpn | 2.6.14-1+deb13u1 | DSA-6069-1 |
| Debian 12 | openvpn | 2.6.3-1+deb12u4 | DSA-6069-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | openvpn | 2.6.14-2ubuntu1.1 | USN-7898-1 |
| Ubuntu 24.04 LTS | openvpn | 2.6.14-0ubuntu0.24.04.3 | USN-7898-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | openvpn +1 | 2.6.10-150600.3.20.1 | SUSE-SU-2026:0831-1 |
| SLES 15 SP6 | openvpn +1 | 2.6.10-150600.3.20.1 | SUSE-SU-2026:0831-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | openvpn | 2.6.10-160000.3.1 | SUSE-SU-2026:20196-1 |
| SLES for SAP 15 SP6 | openvpn +1 | 2.6.10-150600.3.20.1 | SUSE-SU-2026:0831-1 |
| SLES 16.0 | openvpn | 2.6.10-160000.3.1 | SUSE-SU-2026:20196-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | openvpn | 2.6.10-160000.3.1 | openSUSE-SU-2026:20137-1 |
| openSUSE Leap 15.6 | openvpn +1 | 2.6.10-150600.3.20.1 | SUSE-SU-2026:0831-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | openvpn | 2.6.16-r0 | — |
| Alpine v3.23 | openvpn | 2.6.16-r0 | — |
| Alpine v3.22 | openvpn | 2.6.16-r0 | — |
| Alpine v3.21 | openvpn | 2.6.16-r0 | — |
| Alpine v3.20 | openvpn | 2.6.16-r0 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | openvpn | 2.6.16-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | openvpn +1 | 2.6.12-1.amzn2023.0.3 | ALAS2023-2025-1312 |
Advisories 8
- openSUSE-SU-2026:20137-1 Security update for openvpn SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20196-1 Security update for openvpn SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0831-1 Security update for openvpn SUSE / openSUSE Security Updates · Mar 6, 2026
- WID-SEC-2025-2636 OpenVPN: Mehrere Schwachstellen BSI CERT-Bund (WID) · Mar 5, 2026
- WID-SEC-2026-0413 Securepoint UTM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 12, 2026
- USN-7898-1 openvpn vulnerability Ubuntu Security Notices (USN) · Feb 10, 2026
- ALAS2023-2025-1312 Important: openvpn security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Dec 8, 2025
- DSA-6069-1 openvpn - security update Debian Security (DSA / DLA) · Dec 3, 2025