Ovn: egress acls may be bypassed via specially crafted udp packet
Priority LOW 39CWE-284Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 2 fixed, 1 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-284.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00865 58th percentileScored 2026-11-07
Fix Partial ovn: 22.03.8, 24.03.5, 24.09.2Red Hat: 15 advisoriesRed Hat: 2 fixed, 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | ovn | — | 22.03.8, 24.03.5, 24.09.2 | Patch available | CNA |
| Red Hat | Fast Datapath for Red Hat Enterprise Linux 8 | — | 22.03.7-11.el8fdp | Patch available | CNA |
| Red Hat | Fast Datapath for Red Hat Enterprise Linux 8 | — | 22.06.0-273.el8fdp | Patch available | CNA |
| Red Hat | Fast Datapath for Red Hat Enterprise Linux 8 | — | 22.09.2-86.el8fdp | Patch available | CNA |
| Red Hat | Fast Datapath for Red Hat Enterprise Linux 8 | — | 22.12.1-107.el8fdp | Patch available | CNA |
| Red Hat | Fast Datapath for Red Hat Enterprise Linux 8 | — | 23.03.3-22.el8fdp | Patch available | CNA |
| Red Hat | Fast Datapath for Red Hat Enterprise Linux 8 | — | 23.06.4-26.el8fdp | Patch available | CNA |
| Red Hat | Fast Datapath for Red Hat Enterprise Linux 9 | — | 22.03.7-11.el9fdp | Patch available | CNA |
| Red Hat | Fast Datapath for Red Hat Enterprise Linux 9 | — | 22.06.0-273.el9fdp | Patch available | CNA |
| Red Hat | Fast Datapath for Red Hat Enterprise Linux 9 | — | 22.09.2-86.el9fdp | Patch available | CNA |
| Red Hat | Fast Datapath for Red Hat Enterprise Linux 9 | — | 22.12.1-107.el9fdp | Patch available | CNA |
| Red Hat | Fast Datapath for Red Hat Enterprise Linux 9 | — | 23.03.3-22.el9fdp | Patch available | CNA |
| Red Hat | Fast Datapath for Red Hat Enterprise Linux 9 | — | 23.06.4-26.el9fdp | Patch available | CNA |
| Red Hat | Fast Datapath for Red Hat Enterprise Linux 9 | — | 23.09.6-12.el9fdp | Patch available | CNA |
| Red Hat | Fast Datapath for Red Hat Enterprise Linux 9 | — | 24.03.4-53.el9fdp | Patch available | CNA |
| Red Hat | Fast Datapath for Red Hat Enterprise Linux 9 | — | 24.09.1-66.el9fdp | Patch available | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | Not affected | CNA |
- ovn Vendor— Affected — Fixed in 22.03.8, 24.03.5, 24.09.2 Patch available CNA
- Fast Datapath for Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 22.03.7-11.el8fdp Patch available CNA
- Fast Datapath for Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 22.06.0-273.el8fdp Patch available CNA
- Fast Datapath for Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 22.09.2-86.el8fdp Patch available CNA
- Fast Datapath for Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 22.12.1-107.el8fdp Patch available CNA
- Fast Datapath for Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 23.03.3-22.el8fdp Patch available CNA
- Fast Datapath for Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 23.06.4-26.el8fdp Patch available CNA
- Fast Datapath for Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 22.03.7-11.el9fdp Patch available CNA
- Fast Datapath for Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 22.06.0-273.el9fdp Patch available CNA
- Fast Datapath for Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 22.09.2-86.el9fdp Patch available CNA
- Fast Datapath for Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 22.12.1-107.el9fdp Patch available CNA
- Fast Datapath for Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 23.03.3-22.el9fdp Patch available CNA
- Fast Datapath for Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 23.06.4-26.el9fdp Patch available CNA
- Fast Datapath for Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 23.09.6-12.el9fdp Patch available CNA
- Fast Datapath for Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 24.03.4-53.el9fdp Patch available CNA
- Fast Datapath for Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 24.09.1-66.el9fdp Patch available CNA
- Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — Not affected CNA
Remediation
- Fix · CNA ovn Fixed in 22.03.8, 24.03.5, 24.09.2
Red Hat 15 advisories
- RHSA-2025:1097 Released 2025-02-05 · Red Hat rating Importantovn24.09 security update
- Fast Datapath for Red Hat Enterprise Linux 9 ovn24.09-24.09.1-66.el9fdp, ovn24.09-central-24.09.1-66.el9fdp, ovn24.09-host-24.09.1-66.el9fdp +1
- RHSA-2025:1096 Released 2025-02-05 · Red Hat rating Importantovn24.03 security update
- Fast Datapath for Red Hat Enterprise Linux 9 ovn24.03-24.03.4-53.el9fdp, ovn24.03-central-24.03.4-53.el9fdp, ovn24.03-host-24.03.4-53.el9fdp +1
- RHSA-2025:1094 Released 2025-02-05 · Red Hat rating Importantovn23.06 security update
- Fast Datapath for Red Hat Enterprise Linux 9 ovn23.06-23.06.4-26.el9fdp, ovn23.06-central-23.06.4-26.el9fdp, ovn23.06-host-23.06.4-26.el9fdp +1
Show 12 more Red Hat advisories
- RHSA-2025:1095 Released 2025-02-05 · Red Hat rating Importantovn23.09 security update
- Fast Datapath for Red Hat Enterprise Linux 9 ovn23.09-23.09.6-12.el9fdp, ovn23.09-central-23.09.6-12.el9fdp, ovn23.09-host-23.09.6-12.el9fdp +1
- RHSA-2025:1093 Released 2025-02-05 · Red Hat rating Importantovn23.03 security update
- Fast Datapath for Red Hat Enterprise Linux 9 ovn23.03-23.03.3-22.el9fdp, ovn23.03-central-23.03.3-22.el9fdp, ovn23.03-host-23.03.3-22.el9fdp +1
- RHSA-2025:1091 Released 2025-02-05 · Red Hat rating Importantovn22.09 security update
- Fast Datapath for Red Hat Enterprise Linux 9 ovn22.09-22.09.2-86.el9fdp, ovn22.09-central-22.09.2-86.el9fdp, ovn22.09-host-22.09.2-86.el9fdp +1
- RHSA-2025:1092 Released 2025-02-05 · Red Hat rating Importantovn22.12 security update
- Fast Datapath for Red Hat Enterprise Linux 9 ovn22.12-22.12.1-107.el9fdp, ovn22.12-central-22.12.1-107.el9fdp, ovn22.12-host-22.12.1-107.el9fdp +1
- RHSA-2025:1088 Released 2025-02-05 · Red Hat rating Importantovn23.06 security update
- Fast Datapath for Red Hat Enterprise Linux 8 ovn23.06-23.06.4-26.el8fdp, ovn23.06-central-23.06.4-26.el8fdp, ovn23.06-host-23.06.4-26.el8fdp +1
- RHSA-2025:1087 Released 2025-02-05 · Red Hat rating Importantovn23.03 security update
- Fast Datapath for Red Hat Enterprise Linux 8 ovn23.03-23.03.3-22.el8fdp, ovn23.03-central-23.03.3-22.el8fdp, ovn23.03-host-23.03.3-22.el8fdp +1
- RHSA-2025:1086 Released 2025-02-05 · Red Hat rating Importantovn22.12 security update
- Fast Datapath for Red Hat Enterprise Linux 8 ovn22.12-22.12.1-107.el8fdp, ovn22.12-central-22.12.1-107.el8fdp, ovn22.12-host-22.12.1-107.el8fdp +1
- RHSA-2025:1085 Released 2025-02-05 · Red Hat rating Importantovn22.09 security update
- Fast Datapath for Red Hat Enterprise Linux 8 ovn22.09-22.09.2-86.el8fdp, ovn22.09-central-22.09.2-86.el8fdp, ovn22.09-host-22.09.2-86.el8fdp +1
- RHSA-2025:1089 Released 2025-02-05 · Red Hat rating Importantovn22.03 security update
- Fast Datapath for Red Hat Enterprise Linux 9 ovn22.03-22.03.7-11.el9fdp, ovn22.03-central-22.03.7-11.el9fdp, ovn22.03-host-22.03.7-11.el9fdp +1
- RHSA-2025:1090 Released 2025-02-05 · Red Hat rating Importantovn22.06 security update
- Fast Datapath for Red Hat Enterprise Linux 9 ovn22.06-22.06.0-273.el9fdp, ovn22.06-central-22.06.0-273.el9fdp, ovn22.06-host-22.06.0-273.el9fdp +1
- RHSA-2025:1083 Released 2025-02-05 · Red Hat rating Importantovn22.03 security update
- Fast Datapath for Red Hat Enterprise Linux 8 ovn22.03-22.03.7-11.el8fdp, ovn22.03-central-22.03.7-11.el8fdp, ovn22.03-host-22.03.7-11.el8fdp +1
- RHSA-2025:1084 Released 2025-02-05 · Red Hat rating Importantovn22.06 security update
- Fast Datapath for Red Hat Enterprise Linux 8 ovn22.06-22.06.0-273.el8fdp, ovn22.06-central-22.06.0-273.el8fdp, ovn22.06-host-22.06.0-273.el8fdp +1
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat OpenShift Container Platform 4 | Affected | No fix planned: Will not fix |
| Fast Datapath for Red Hat Enterprise Linux 8 | Fixed | RHSA-2025:1083, RHSA-2025:1084, RHSA-2025:1085, RHSA-2025:1086, RHSA-2025:1087, RHSA-2025:1088 |
| Fast Datapath for Red Hat Enterprise Linux 9 | Fixed | RHSA-2025:1089, RHSA-2025:1090, RHSA-2025:1091, RHSA-2025:1092, RHSA-2025:1093, RHSA-2025:1094, RHSA-2025:1095, RHSA-2025:1096, RHSA-2025:1097 |
Not affected: 1 product
- Red Hat OpenShift Container Platform 4
Timeline
- 2026-10-02 Threatist record created from CVE-2025-0650
- 2026-10-03 Alias added: GHSA-gmx5-xv9g-ph7f
References
Advisory 15
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Sources
- CVE-2025-0650 · CVE Program
- CVE-2025-0650 · NVD
- FIRST EPSS
- GHSA-gmx5-xv9g-ph7f · GitHub Advisory Database · CC BY 4.0
- CVE-2025-0650 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences