Ovn: egress acls may be bypassed via specially crafted udp packet
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.
- BDU:2025-03286
- openSUSE-SU-2025:14757-1
- RHSA-2025:1083
- RHSA-2025:1084
- RHSA-2025:1085
- RHSA-2025:1086
- RHSA-2025:1087
- RHSA-2025:1088
- 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
- SUSE-SU-2025:0561-1
- SUSE-SU-2025:0578-1
- SUSE-SU-2025:0583-1
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for help- Published
- Jan 23, 2025
- Updated
- Jun 17, 2026
- EPSS
- 0.9% · 57th percentile
- CWE
- CWE-284
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Report tools
Action score
32
Monitor
Low priority for now.
- CVSS
- 32 / 40 · 8.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.9%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · redhat
- 8.1
- NVD has not scored this yet; the score shown is the CNA’s.
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
—
Versions reported by the vendor
Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.
github.com/ovn-org/ovn ovn
- 22.03.8, 24.03.5, 24.09.2not affected
Red Hat Fast Datapath for Red Hat Enterprise Linux 8
- 0:22.03.7-11.el8fdp and laternot affected · rpm
- 0:22.06.0-273.el8fdp and laternot affected · rpm
- 0:22.09.2-86.el8fdp and laternot affected · rpm
- 0:22.12.1-107.el8fdp and laternot affected · rpm
- 0:23.03.3-22.el8fdp and laternot affected · rpm
- 0:23.06.4-26.el8fdp and laternot affected · rpm
Red Hat Fast Datapath for Red Hat Enterprise Linux 9
- 0:22.03.7-11.el9fdp and laternot affected · rpm
- 0:22.06.0-273.el9fdp and laternot affected · rpm
- 0:22.09.2-86.el9fdp and laternot affected · rpm
- 0:22.12.1-107.el9fdp and laternot affected · rpm
- 0:23.03.3-22.el9fdp and laternot affected · rpm
- 0:23.06.4-26.el9fdp and laternot affected · rpm
- 0:23.09.6-12.el9fdp and laternot affected · rpm
- 0:24.03.4-53.el9fdp and laternot affected · rpm
- 0:24.09.1-66.el9fdp and laternot affected · rpm
Red Hat Red Hat OpenShift Container Platform 4
- all versionsunknown
- all versionsunknown
- all versionsunknown
- all versionsunknown
- all versionsaffected
- all versionsunknown
- all versionsunknown
- all versionsunknown
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | ovn | all versions | — |
| Debian:13 | ovn | before 25.03.0~git20250216.7c69af7-1 | 25.03.0~git20250216.7c69af7-1 |
| openSUSE:Tumbleweed | openvswitch | before 3.3.2-25.1 | 3.3.2-25.1 |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.03 | before 0:22.03.7-11.el8fdp | 0:22.03.7-11.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.03-central | before 0:22.03.7-11.el8fdp | 0:22.03.7-11.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.03-central-debuginfo | before 0:22.03.7-11.el8fdp | 0:22.03.7-11.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.03-debuginfo | before 0:22.03.7-11.el8fdp | 0:22.03.7-11.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.03-debugsource | before 0:22.03.7-11.el8fdp | 0:22.03.7-11.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.03-host | before 0:22.03.7-11.el8fdp | 0:22.03.7-11.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.03-host-debuginfo | before 0:22.03.7-11.el8fdp | 0:22.03.7-11.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.03-vtep | before 0:22.03.7-11.el8fdp | 0:22.03.7-11.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.03-vtep-debuginfo | before 0:22.03.7-11.el8fdp | 0:22.03.7-11.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.06 | before 0:22.06.0-273.el8fdp | 0:22.06.0-273.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.06-central | before 0:22.06.0-273.el8fdp | 0:22.06.0-273.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.06-central-debuginfo | before 0:22.06.0-273.el8fdp | 0:22.06.0-273.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.06-debuginfo | before 0:22.06.0-273.el8fdp | 0:22.06.0-273.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.06-debugsource | before 0:22.06.0-273.el8fdp | 0:22.06.0-273.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.06-host | before 0:22.06.0-273.el8fdp | 0:22.06.0-273.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.06-host-debuginfo | before 0:22.06.0-273.el8fdp | 0:22.06.0-273.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.06-vtep | before 0:22.06.0-273.el8fdp | 0:22.06.0-273.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.06-vtep-debuginfo | before 0:22.06.0-273.el8fdp | 0:22.06.0-273.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.09 | before 0:22.09.2-86.el8fdp | 0:22.09.2-86.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.09-central | before 0:22.09.2-86.el8fdp | 0:22.09.2-86.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.09-central-debuginfo | before 0:22.09.2-86.el8fdp | 0:22.09.2-86.el8fdp |
+96
Same product
red hat: all recordsOther highest-scoring records for the same primary product.
- CVE-2024-52336Tuned: `script_pre` and `script_post` options allow to pass arbitrary scripts executed by root31Monitor
- CVE-2024-11614Dpdk: denial of service from malicious guest on hypervisors using dpdk vhost library29Monitor
- CVE-2024-2182Ovn: insufficient validation of bfd packets may lead to denial of service26Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:ovn | 25.03.0~git20250216.7c69af7-1 · Debian:13 | Package registry (OSV) |
| opensuse:openvswitch | 3.1.0-150600.33.6.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:openvswitch3 | 3.1.0-150500.3.22.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| red hat:ovn22.03 | 0:22.03.7-11.el8fdp · Red Hat:enterprise_linux:8::fastdatapath | Package registry (OSV) |
| red hat:ovn22.03-central | 0:22.03.7-11.el8fdp · Red Hat:enterprise_linux:8::fastdatapath | Package registry (OSV) |
| red hat:ovn22.03-central-debuginfo | 0:22.03.7-11.el8fdp · Red Hat:enterprise_linux:8::fastdatapath | Package registry (OSV) |
| red hat:ovn22.03-debuginfo | 0:22.03.7-11.el8fdp · Red Hat:enterprise_linux:8::fastdatapath | Package registry (OSV) |
| red hat:ovn22.03-debugsource | 0:22.03.7-11.el8fdp · Red Hat:enterprise_linux:8::fastdatapath | Package registry (OSV) |
| red hat:ovn22.03-host | 0:22.03.7-11.el8fdp · Red Hat:enterprise_linux:8::fastdatapath | Package registry (OSV) |
| red hat:ovn22.03-host-debuginfo | 0:22.03.7-11.el8fdp · Red Hat:enterprise_linux:8::fastdatapath | Package registry (OSV) |
| red hat:ovn22.03-vtep | 0:22.03.7-11.el8fdp · Red Hat:enterprise_linux:8::fastdatapath | Package registry (OSV) |
| red hat:ovn22.03-vtep-debuginfo | 0:22.03.7-11.el8fdp · Red Hat:enterprise_linux:8::fastdatapath | Package registry (OSV) |
| red hat:ovn22.06 | 0:22.06.0-273.el8fdp · Red Hat:enterprise_linux:8::fastdatapath | Package registry (OSV) |
| red hat:ovn22.06-central | 0:22.06.0-273.el8fdp · Red Hat:enterprise_linux:8::fastdatapath | Package registry (OSV) |
| red hat:ovn22.06-central-debuginfo | 0:22.06.0-273.el8fdp · Red Hat:enterprise_linux:8::fastdatapath | Package registry (OSV) |
| suse:openvswitch | 2.11.5-3.24.2 · SUSE:Linux Enterprise Server 12 SP5-LTSS | Package registry (OSV) |
| suse:openvswitch | 3.1.0-150600.33.6.1 · SUSE:Linux Enterprise Module for Package Hub 15 SP6 | Package registry (OSV) |
| suse:openvswitch3 | 3.1.0-150500.3.22.1 · SUSE:Linux Enterprise Micro 5.5 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-284 · Improper Access ControlCVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Embedding Scripts within ScriptsCAPEC-19likelihood: High · High
- Malicious Logic InsertionCAPEC-441likelihood: Medium · High
- Modification of Windows Service ConfigurationCAPEC-478likelihood: Low · High
- Malicious Root CertificateCAPEC-479likelihood: Low · Low
- Intent SpoofCAPEC-502
- WebView ExposureCAPEC-503
- Data Injected During ConfigurationCAPEC-536likelihood: Low · High
- Incomplete Data Deletion in a Multi-Tenant EnvironmentCAPEC-546likelihood: Low · Medium
ATT&CK techniques
- RootkitT1014
- Obfuscated Files or Information: Embedded PayloadsT1027.009
- Boot or Logon Initialization ScriptsT1037
- Taint shared contentT1080
- Server Software Component: Terminal Services DLLT1505.005
- Pre-OS Boot:BootkitT1542.003
- Create or Modify System ProcessT1543
- Create or Modify System Process: Launch AgentT1543.001
- Create or Modify System Process:Windows ServiceT1543.003
- Create or Modify System Process: Launch DaemonT1543.004
- Event Triggered Execution:Change Default File AssociationT1546.001
- Event Triggered Execution:.bash_profile and .bashrcT1546.004
- Event Triggered Execution: Accessibility FeaturesT1546.008
- Event Triggered Execution: Installer PackagesT1546.016
- Boot or Logon Autostart ExecutionT1547
- Boot or Logon Autostart Execution:Kernel Modules and ExtensionsT1547.006
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- access.redhat.com/errata/RHSA-2025:1083
- access.redhat.com/errata/RHSA-2025:1084
- access.redhat.com/errata/RHSA-2025:1085
- access.redhat.com/errata/RHSA-2025:1086
- access.redhat.com/errata/RHSA-2025:1087
- access.redhat.com/errata/RHSA-2025:1088
- access.redhat.com/errata/RHSA-2025:1089
- access.redhat.com/errata/RHSA-2025:1090
- access.redhat.com/errata/RHSA-2025:1091
- access.redhat.com/errata/RHSA-2025:1092
- access.redhat.com/errata/RHSA-2025:1093
- access.redhat.com/errata/RHSA-2025:1094
- access.redhat.com/errata/RHSA-2025:1095
- access.redhat.com/errata/RHSA-2025:1096
- access.redhat.com/errata/RHSA-2025:1097
- access.redhat.com/security/cve/CVE-2025-0650
- bugzilla.redhat.com/show_bug.cgi?id=2339537
- www.openwall.com/lists/oss-security/2025/01/22/5
- www.openwall.com/lists/oss-security/2025/01/22/11
Vendor advisories and official records. Exploit/PoC links are deliberately left out.