Description
A flaw was found in the Open Virtual Network (OVN). Specially crafted UDP packets may bypass egress access control lists (ACLs) in OVN installations configured with a logical switch with DNS records set on it and if the same switch has any egress ACLs configured. This issue can lead to unauthorized access to virtual machines and containers running on the OVN network.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | ovn | — | 22.03.8 |
| Red Hat | Fast Datapath for Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Fast Datapath for Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — |
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 13 | ovn | 25.03.0~git20250216.7c69af7-1 | — |
| Debian 12 | ovn | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | ovn | 24.03.2-0ubuntu0.24.04.2 | USN-7396-1 |
| Ubuntu 22.04 LTS | ovn | 22.03.3-0ubuntu0.22.04.5 | USN-7396-1 |
| Ubuntu 20.04 LTS | ovn | 20.03.2-0ubuntu0.20.04.6 | USN-7396-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | ovn22.03 +3 | 22.03.7-11.el9fdp | RHSA-2025:1089 |
| RHEL 9 | ovn22.06 +3 | 22.06.0-273.el9fdp | RHSA-2025:1090 |
| RHEL 9 | ovn22.09 +3 | 22.09.2-86.el9fdp | RHSA-2025:1091 |
| RHEL 9 | ovn22.12 +3 | 22.12.1-107.el9fdp | RHSA-2025:1092 |
| RHEL 9 | ovn23.03 +3 | 23.03.3-22.el9fdp | RHSA-2025:1093 |
| RHEL 9 | ovn23.06 +3 | 23.06.4-26.el9fdp | RHSA-2025:1094 |
| RHEL 9 | ovn23.09 +3 | 23.09.6-12.el9fdp | RHSA-2025:1095 |
| RHEL 9 | ovn24.03 +3 | 24.03.4-53.el9fdp | RHSA-2025:1096 |
| RHEL 9 | ovn24.09 +3 | 24.09.1-66.el9fdp | RHSA-2025:1097 |
| RHEL 8 | ovn22.03 +3 | 22.03.7-11.el8fdp | RHSA-2025:1083 |
| RHEL 8 | ovn22.06 +3 | 22.06.0-273.el8fdp | RHSA-2025:1084 |
| RHEL 8 | ovn22.09 +3 | 22.09.2-86.el8fdp | RHSA-2025:1085 |
| RHEL 8 | ovn22.12 +3 | 22.12.1-107.el8fdp | RHSA-2025:1086 |
| RHEL 8 | ovn23.03 +3 | 23.03.3-22.el8fdp | RHSA-2025:1087 |
| RHEL 8 | ovn23.06 +3 | 23.06.4-26.el8fdp | RHSA-2025:1088 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | openvswitch | 3.1.0-150600.33.6.1 | SUSE-SU-2026:0280-1, SUSE-SU-2025:0583-1 |
| SLES 15 SP5 | openvswitch | 2.14.2-150400.24.26.1 | SUSE-SU-2025:0578-1 |
| SLES 15 SP5 | openvswitch3 | 3.1.0-150500.3.22.1 | SUSE-SU-2026:0290-1, SUSE-SU-2025:0742-1 |
| SLES 15 SP4 | openvswitch | 2.14.2-150400.24.26.1 | SUSE-SU-2025:0578-1 |
| SLES 12 SP5 | openvswitch | 2.11.5-3.24.2 | SUSE-SU-2025:0561-1 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | openvswitch | 3.1.7-150600.33.9.1 | SUSE-SU-2026:0280-1 |
| SLES for SAP 15 SP5 | openvswitch | 2.14.2-150400.24.26.1 | SUSE-SU-2025:0578-1 |
| SLES for SAP 15 SP5 | openvswitch3 | 3.1.0-150500.3.22.1 | SUSE-SU-2026:0290-1, SUSE-SU-2025:0742-1 |
| SLES for SAP 15 SP4 | openvswitch | 2.14.2-150400.24.26.1 | SUSE-SU-2025:0578-1 |
| SLE Micro 6.1 | openvswitch | 3.1.7-slfo.1.1_2.1 | SUSE-SU-2026:23188-1, SUSE-SU-2026:20061-1 |
| SLE Micro 6.0 | openvswitch | 3.1.7-4.1 | SUSE-SU-2026:20049-1 |
| SLE Micro 5.5 | openvswitch3 | 3.1.0-150500.3.22.1 | SUSE-SU-2026:0290-1, SUSE-SU-2025:0742-1 |
| SLE HPC 15 SP5 | openvswitch3 | 3.1.0-150500.3.22.1 | SUSE-SU-2026:0290-1, SUSE-SU-2025:0742-1 |
| SLE HPC 15 SP4 | openvswitch | 2.14.2-150400.24.26.1 | SUSE-SU-2025:0578-1 |
| SUSE Manager Server 4.3 | openvswitch | 2.14.2-150400.24.26.1 | SUSE-SU-2025:0578-1 |
| SUSE Manager Proxy 4.3 | openvswitch | 2.14.2-150400.24.26.1 | SUSE-SU-2025:0578-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | openvswitch | 3.3.2-25.1 | openSUSE-SU-2025:14757-1 |
| openSUSE Leap 15.6 | openvswitch | 3.1.0-150600.33.6.1 | SUSE-SU-2026:0280-1, SUSE-SU-2025:0583-1 |
| openSUSE Leap 15.6 | openvswitch3 | 3.1.0-150500.3.22.1 | SUSE-SU-2026:0290-1, SUSE-SU-2025:0742-1 |
Advisories 27
- SUSE-SU-2026:23188-1 Security update for openvswitch SUSE / openSUSE Security Updates · Aug 26, 2026
- SUSE-SU-2026:20061-1 Security update for openvswitch SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20049-1 Security update for openvswitch SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0290-1 Security update for openvswitch3 SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0280-1 Security update for openvswitch SUSE / openSUSE Security Updates · Mar 23, 2026
- RHSA-2025:1088 Red Hat Security Advisory: ovn23.06 security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2025:1084 Red Hat Security Advisory: ovn22.06 security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2025:1096 Red Hat Security Advisory: ovn24.03 security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2025:1089 Red Hat Security Advisory: ovn22.03 security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2025:1097 Red Hat Security Advisory: ovn24.09 security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2025:1090 Red Hat Security Advisory: ovn22.06 security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2025:1083 Red Hat Security Advisory: ovn22.03 security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2025:1091 Red Hat Security Advisory: ovn22.09 security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2025:1092 Red Hat Security Advisory: ovn22.12 security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2025:1093 Red Hat Security Advisory: ovn23.03 security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2025:1086 Red Hat Security Advisory: ovn22.12 security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2025:1094 Red Hat Security Advisory: ovn23.06 security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2025:1087 Red Hat Security Advisory: ovn23.03 security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2025:1095 Red Hat Security Advisory: ovn23.09 security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2025:1085 Red Hat Security Advisory: ovn22.09 security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- USN-7396-1 ovn vulnerability Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2025:0578-1 Security update for openvswitch SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0742-1 Security update for openvswitch3 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2025:14757-1 libopenvswitch-3_3-0-3.3.2-25.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0583-1 Security update for openvswitch SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0561-1 Security update for openvswitch SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2025-0281 Red Hat Enterprise Linux (Fast Datapath): Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · Jan 26, 2026
References
- RHSA-2025:1083 vendor-advisory
- RHSA-2025:1084 vendor-advisory
- RHSA-2025:1085 vendor-advisory
- RHSA-2025:1086 vendor-advisory
- RHSA-2025:1087 vendor-advisory
- RHSA-2025:1088 vendor-advisory
- RHSA-2025:1089 vendor-advisory
- RHSA-2025:1090 vendor-advisory
- RHSA-2025:1091 vendor-advisory
- RHSA-2025:1092 vendor-advisory
- RHSA-2025:1093 vendor-advisory
- RHSA-2025:1094 vendor-advisory
- RHSA-2025:1095 vendor-advisory
- RHSA-2025:1096 vendor-advisory
- RHSA-2025:1097 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2025-0650 vdb-entry
- RHBZ#2339537 issue-tracking
- https://www.openwall.com/lists/oss-security/2025/01/22/5