Description
A flaw was found in openvswitch (OVS). When processing an IP packet with protocol 0, OVS will install the datapath flow without the action modifying the IP header. This issue results (for both kernel and userspace datapath) in installing a datapath flow matching all IP protocols (nw_proto is wildcarded) for this flow, but with an incorrect action, possibly causing incorrect handling of other IP packets with a != 0 IP protocol that matches this dp flow.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | openvswitch | unknown | — |
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 | openvswitch | 3.1.0-2 | — |
| Debian 13 | openvswitch | 3.1.0-2 | — |
| Debian 12 | openvswitch | 3.1.0-2 | — |
| Debian 11 | openvswitch | 2.15.0+ds1-2+deb11u4 | DSA-5387-1 |
| Debian 10 | openvswitch | 2.10.7+ds1-0+deb10u4 | DLA-3410-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | openvswitch | 2.17.5-0ubuntu0.22.04.2 | USN-6068-1 |
| Ubuntu 20.04 LTS | openvswitch | 2.13.8-0ubuntu1.2 | USN-6068-1 |
| Ubuntu 18.04 LTS | openvswitch | 2.9.8-0ubuntu0.18.04.5 | USN-6068-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | openvswitch | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | openvswitch2.17 +4 | 2.17.0-77.el9fdp | RHSA-2023:1769 |
| RHEL 9 | openvswitch3.1 +4 | 3.1.0-14.el9fdp | RHSA-2023:1770 |
| RHEL 8 | openvswitch2.13 +5 | 2.13.0-214.el8fdp | RHSA-2023:1823 |
| RHEL 8 | openvswitch2.15 +5 | 2.15.0-136.el8fdp | RHSA-2023:1824 |
| RHEL 8 | openvswitch2.17 +5 | 2.17.0-88.el8fdp | RHSA-2023:1765 |
| RHEL 8 | openvswitch3.1 +5 | 3.1.0-17.el8fdp | RHSA-2023:1766 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhev Hypervisor 4 | redhat-virtualization-host +1 | 4.5.3-202306050942_8.6 | RHSA-2023:3491 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | openvswitch | 3.1.7-150600.33.9.1 | SUSE-SU-2026:0280-1 |
| SLES 15 SP5 | openvswitch | 2.14.2-150400.24.9.1 | SUSE-SU-2023:2296-1 |
| SLES 15 SP5 | openvswitch3 | 3.1.0-150500.3.3.1 | SUSE-SU-2026:0290-1, SUSE-SU-2023:2536-1 |
| SLES 15 SP4 | openvswitch | 2.14.2-150400.24.9.1 | SUSE-SU-2023:2296-1 |
| SLES 15 SP3 | openvswitch | 2.14.2-150300.19.8.1 | SUSE-SU-2023:2275-1 |
| SLES 15 SP2 | openvswitch | 2.13.2-150200.9.22.1 | SUSE-SU-2023:2274-1 |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | openvswitch | 2.11.5-3.18.2 | SUSE-SU-2023:2621-1 |
| SLES for SAP 15 SP6 | openvswitch | 3.1.7-150600.33.9.1 | SUSE-SU-2026:0280-1 |
| SLES for SAP 15 SP5 | openvswitch3 | 3.1.7-150500.3.25.1 | SUSE-SU-2026:0290-1 |
| SLES for SAP 15 SP3 | openvswitch | 2.14.2-150300.19.8.1 | SUSE-SU-2023:2275-1 |
| SLES for SAP 15 SP2 | openvswitch | 2.13.2-150200.9.22.1 | SUSE-SU-2023:2274-1 |
| SLES for SAP 12 SP5 | openvswitch | 2.11.5-3.18.2 | SUSE-SU-2023:2621-1 |
| SLE Real Time 15 SP3 | openvswitch | 2.14.2-150300.19.8.1 | SUSE-SU-2023:2275-1 |
| SLE Micro 5.5 | openvswitch3 | 3.1.7-150500.3.25.1 | SUSE-SU-2026:0290-1 |
| SLE HPC 15 SP5 | openvswitch3 | 3.1.7-150500.3.25.1 | SUSE-SU-2026:0290-1 |
| SLE HPC 15 SP3 | openvswitch | 2.14.2-150300.19.8.1 | SUSE-SU-2023:2275-1 |
| SLE HPC 15 SP2 | openvswitch | 2.13.2-150200.9.22.1 | SUSE-SU-2023:2274-1 |
| SUSE Manager Server 4.2 | openvswitch | 2.14.2-150300.19.8.1 | SUSE-SU-2023:2275-1 |
| SUSE Manager Proxy 4.2 | openvswitch | 2.14.2-150300.19.8.1 | SUSE-SU-2023:2275-1 |
| SUSE Enterprise Storage 7.1 | openvswitch | 2.14.2-150300.19.8.1 | SUSE-SU-2023:2275-1 |
| SUSE Enterprise Storage 7 | openvswitch | 2.13.2-150200.9.22.1 | SUSE-SU-2023:2274-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | openvswitch | 3.1.0-14.1 | openSUSE-SU-2024:12942-1 |
| openSUSE Leap 15.6 | openvswitch | 3.1.7-150600.33.9.1 | SUSE-SU-2026:0280-1 |
| openSUSE Leap 15.6 | openvswitch3 | 3.1.7-150500.3.25.1 | SUSE-SU-2026:0290-1 |
| openSUSE Leap 15.5 | openvswitch | 2.14.2-150400.24.9.1 | SUSE-SU-2023:2296-1 |
| openSUSE Leap 15.5 | openvswitch3 | 3.1.0-150500.3.3.1 | SUSE-SU-2023:2536-1 |
| openSUSE Leap 15.4 | openvswitch | 2.13.2-150200.9.22.1 | SUSE-SU-2023:2296-1, SUSE-SU-2023:2274-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | openvswitch | 2.17.6-r0 | — |
| Alpine v3.23 | openvswitch | 2.17.6-r0 | — |
| Alpine v3.22 | openvswitch | 2.17.6-r0 | — |
| Alpine v3.21 | openvswitch | 2.17.6-r0 | — |
| Alpine v3.20 | openvswitch | 2.17.6-r0 | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | openvswitch | 2.17.6-r0 | — |
| Alpine v3.18 | openvswitch | 2.17.6-r0 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | openvswitch | 2.17.5-3 | — |
| Azure Linux 2 (CBL-Mariner) | openvswitch | 2.17.5-2 | — |
Advisories 19
- RHSA-2023:3491 Red Hat Security Advisory: Red Hat Virtualization Host 4.4.z SP 1 security update Red Hat Security Advisories (RHSA) · Sep 30, 2026
- RHSA-2023:1824 Red Hat Security Advisory: openvswitch2.15 security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2023:1823 Red Hat Security Advisory: openvswitch2.13 security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2023:1770 Red Hat Security Advisory: openvswitch3.1 security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2023:1769 Red Hat Security Advisory: openvswitch2.17 security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2023:1765 Red Hat Security Advisory: openvswitch2.17 security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2023:1766 Red Hat Security Advisory: openvswitch3.1 security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-6068-1 openvswitch vulnerability Ubuntu Security Notices (USN) · Apr 27, 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
- DSA-5387-1 openvswitch - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3410-1 openvswitch - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2023:2621-1 Security update for openvswitch SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:12942-1 libopenvswitch-3_1-0-3.1.0-14.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2536-1 Security update for openvswitch3 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2296-1 Security update for openvswitch SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2274-1 Security update for openvswitch SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2275-1 Security update for openvswitch SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-0964 Red Hat Enterprise Linux (openvswitch): Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Jan 26, 2026
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2137666
- https://www.openwall.com/lists/oss-security/2023/04/06/1
- DSA-5387 vendor-advisory
- FEDORA-2023-7da03dc2ae vendor-advisory
- [debian-lts-announce] 20230501 [SECURITY] [DLA 3410-1] openvswitch security update mailing-list
- GLSA-202311-16 vendor-advisory