Ovn: insufficient validation of bfd packets may lead to denial of service
A flaw was found in the Open Virtual Network (OVN). In OVN clusters where BFD is used between hypervisors for high availability, an attacker can inject specially crafted BFD packets from inside unprivileged workloads, including virtual machines or containers, that can trigger a denial of service.
- Published
- Mar 12, 2024
- Updated
- Jun 17, 2026
- EPSS
- 0.8% · 54th percentile
- CWE
- CWE-346
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Report tools
Action score
26
Monitor
Low priority for now.
- CVSS
- 26 / 40 · 6.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.8%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · redhat
- 6.5
- 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.
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 helpAffected 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.
Red Hat Fast Datapath for Red Hat Enterprise Linux 8
- 0:23.06.1-112.el8fdp and laternot affected · rpm
- 0:22.12.1-94.el8fdp and laternot affected · rpm
- 0:22.03.3-71.el8fdp and laternot affected · rpm
- 0:23.03.1-100.el8fdp and laternot affected · rpm
- 0:21.12.0-142.el8fdp and laternot affected · rpm
Red Hat Fast Datapath for Red Hat Enterprise Linux 9
- 0:23.09.0-136.el9fdp and laternot affected · rpm
- 0:23.06.1-112.el9fdp and laternot affected · rpm
- 0:22.12.1-94.el9fdp and laternot affected · rpm
- 0:22.03.3-71.el9fdp and laternot affected · rpm
- 0:23.03.1-100.el9fdp and laternot affected · rpm
Red Hat Fast Datapath for RHEL 7
- all versionsunknown
- all versionsunknown
- all versionsunknown
Red Hat Fast Datapath for RHEL 8
- all versionsunknown
- all versionsunknown
- all versionsunknown
- all versionsunknown
- all versionsunknown
Red Hat Fast Datapath for RHEL 9
- all versionsaffected
- all versionsunknown
- all versionsunknown
www.github.com/ovn-org/ovn/ ovn
- 20.03.0 and lateraffected · semver
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 | before 23.03.1-1~deb12u2 | 23.03.1-1~deb12u2 |
| Debian:13 | ovn | before 24.03.1-1 | 24.03.1-1 |
| Red Hat:enterprise_linux:8::fastdatapath | ovn-2021 | before 0:21.12.0-142.el8fdp | 0:21.12.0-142.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn-2021-central | before 0:21.12.0-142.el8fdp | 0:21.12.0-142.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn-2021-central-debuginfo | before 0:21.12.0-142.el8fdp | 0:21.12.0-142.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn-2021-debuginfo | before 0:21.12.0-142.el8fdp | 0:21.12.0-142.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn-2021-debugsource | before 0:21.12.0-142.el8fdp | 0:21.12.0-142.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn-2021-host | before 0:21.12.0-142.el8fdp | 0:21.12.0-142.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn-2021-host-debuginfo | before 0:21.12.0-142.el8fdp | 0:21.12.0-142.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn-2021-vtep | before 0:21.12.0-142.el8fdp | 0:21.12.0-142.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn-2021-vtep-debuginfo | before 0:21.12.0-142.el8fdp | 0:21.12.0-142.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.03 | before 0:22.03.3-71.el8fdp | 0:22.03.3-71.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.03-central | before 0:22.03.3-71.el8fdp | 0:22.03.3-71.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.03-central-debuginfo | before 0:22.03.3-71.el8fdp | 0:22.03.3-71.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.03-debuginfo | before 0:22.03.3-71.el8fdp | 0:22.03.3-71.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.03-debugsource | before 0:22.03.3-71.el8fdp | 0:22.03.3-71.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.03-host | before 0:22.03.3-71.el8fdp | 0:22.03.3-71.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.03-host-debuginfo | before 0:22.03.3-71.el8fdp | 0:22.03.3-71.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.03-vtep | before 0:22.03.3-71.el8fdp | 0:22.03.3-71.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.03-vtep-debuginfo | before 0:22.03.3-71.el8fdp | 0:22.03.3-71.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.12 | before 0:22.12.1-94.el8fdp | 0:22.12.1-94.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.12-central | before 0:22.12.1-94.el8fdp | 0:22.12.1-94.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.12-central-debuginfo | before 0:22.12.1-94.el8fdp | 0:22.12.1-94.el8fdp |
| Red Hat:enterprise_linux:8::fastdatapath | ovn22.12-debuginfo | before 0:22.12.1-94.el8fdp | 0:22.12.1-94.el8fdp |
+75
Same product
red hat: all recordsOther highest-scoring records for the same primary product.
- CVE-2025-0650Ovn: egress acls may be bypassed via specially crafted udp packet32Monitor
- 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
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 | 23.03.1-1~deb12u2 · Debian:12 | Package registry (OSV) |
| opensuse:openvswitch | 3.1.7-150600.33.9.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:openvswitch3 | 3.1.7-150500.3.25.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| red hat:ovn22.12 | 0:22.12.1-94.el8fdp · Red Hat:enterprise_linux:8::fastdatapath | Package registry (OSV) |
| red hat:ovn22.12-central | 0:22.12.1-94.el8fdp · Red Hat:enterprise_linux:8::fastdatapath | Package registry (OSV) |
| red hat:ovn22.12-central-debuginfo | 0:22.12.1-94.el8fdp · Red Hat:enterprise_linux:8::fastdatapath | Package registry (OSV) |
| red hat:ovn23.06 | 0:23.06.1-112.el8fdp · Red Hat:enterprise_linux:8::fastdatapath | Package registry (OSV) |
| red hat:ovn23.06-central | 0:23.06.1-112.el8fdp · Red Hat:enterprise_linux:8::fastdatapath | Package registry (OSV) |
| red hat:ovn23.06-central-debuginfo | 0:23.06.1-112.el8fdp · Red Hat:enterprise_linux:8::fastdatapath | Package registry (OSV) |
| red hat:ovn23.06-debuginfo | 0:23.06.1-112.el8fdp · Red Hat:enterprise_linux:8::fastdatapath | Package registry (OSV) |
| red hat:ovn23.06-debugsource | 0:23.06.1-112.el8fdp · Red Hat:enterprise_linux:8::fastdatapath | Package registry (OSV) |
| red hat:ovn23.06-host | 0:23.06.1-112.el8fdp · Red Hat:enterprise_linux:8::fastdatapath | Package registry (OSV) |
| red hat:ovn23.06-host-debuginfo | 0:23.06.1-112.el8fdp · Red Hat:enterprise_linux:8::fastdatapath | Package registry (OSV) |
| red hat:ovn23.06-vtep | 0:23.06.1-112.el8fdp · Red Hat:enterprise_linux:8::fastdatapath | Package registry (OSV) |
| red hat:ovn23.06-vtep-debuginfo | 0:23.06.1-112.el8fdp · Red Hat:enterprise_linux:8::fastdatapath | Package registry (OSV) |
| suse:openvswitch | 3.1.7-150600.33.9.1 · SUSE:Linux Enterprise Server 15 SP6-LTSS | Package registry (OSV) |
| suse:openvswitch3 | 3.1.7-150500.3.25.1 · 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.
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.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-346 · Origin Validation ErrorCVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/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)
- JSON Hijacking (aka JavaScript Hijacking)CAPEC-111likelihood: High · High
- Cache PoisoningCAPEC-141likelihood: High · High
- DNS Cache PoisoningCAPEC-142likelihood: High · High
- Exploit Script-Based APIsCAPEC-160Medium
- Exploitation of Trusted IdentifiersCAPEC-21likelihood: High · High
- Application API Message Manipulation via Man-in-the-MiddleCAPEC-384Low
- Transaction or Event Tampering via Application API ManipulationCAPEC-385Medium
- Application API Navigation RemappingCAPEC-386Medium
ATT&CK techniques
- Access Token ManipulationT1134
- Access Token Manipulation:Token Impersonation/TheftT1134.001
- Steal Application Access TokenT1528
- Steal Web Session CookieT1539
- Use Alternate Authentication Material:Web Session CookieT1550.004
- Adversary-in-the-Middle: ARP Cache PoisoningT1557.002
- Compromise Infrastructure: DNS ServerT1584.002
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- access.redhat.com/errata/RHSA-2024:1385
- access.redhat.com/errata/RHSA-2024:1386
- access.redhat.com/errata/RHSA-2024:1387
- access.redhat.com/errata/RHSA-2024:1388
- access.redhat.com/errata/RHSA-2024:1390
- access.redhat.com/errata/RHSA-2024:1391
- access.redhat.com/errata/RHSA-2024:1392
- access.redhat.com/errata/RHSA-2024:1393
- access.redhat.com/errata/RHSA-2024:1394
- access.redhat.com/errata/RHSA-2024:4035
- access.redhat.com/security/cve/CVE-2024-2182
- bugzilla.redhat.com/show_bug.cgi?id=2267840
- mail.openvswitch.org/pipermail/ovs-announce/2024-March/000346.html
- www.openwall.com/lists/oss-security/2024/03/12/5
- www.openwall.com/lists/oss-security/2024/03/12/5
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/APR4GCVCMQD3DQUKXDNGIXCCYGE5V7IT/
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CB4N522FCS4XWAPUKRWZF6QZ657FCIDF/
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XRKXOOOKD56TY3JQVB45N3GCTX3EG4BV/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.