Openvswitch don't match packets on nd_target field
Published Oct 6, 2023
7.1
HIGHCVSS 3.1
EPSS 0.39%
Description
A flaw was found in Open vSwitch that allows ICMPv6 Neighbor Advertisement packets between virtual machines to bypass OpenFlow rules. This issue may allow a local attacker to create specially crafted packets with a modified or spoofed target IP address field that can redirect ICMPv6 traffic to arbitrary IP addresses.
Affected products
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- Vendor n/a Product Openvswitch Defaultaffected
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||
|---|---|---|---|---|---|---|
| Fedora | Fedora | affected |
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| Red Hat | Fast Datapath for RHEL 7 | affected |
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| Red Hat | Fast Datapath for RHEL 8 | affected |
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| Red Hat | Fast Datapath for RHEL 9 | affected |
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| Red Hat | Red Hat Enterprise Linux 7 | affected |
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| Red Hat | Red Hat OpenShift Container Platform 4 | affected |
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| Red Hat | Red Hat Virtualization 4 | affected |
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| n/a | Openvswitch | affected |
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Configuration 1
- < 2023-02-28
Configuration 2
- 4.0
- 4.0
- 7.0
Configuration 3
- n/a
Running on/with
- 7.0
- 8.0
- 9.0
No data.
Fast Datapath for Red Hat Enterprise Linux 8
openvswitch2.17-0:2.17.0-148.el8fdp
Fixed · RHSA-2024:1234
Fast Datapath for Red Hat Enterprise Linux 8
openvswitch3.1-0:3.1.0-96.el8fdp
Fixed · RHSA-2024:1235
Fast Datapath for Red Hat Enterprise Linux 9
openvswitch2.17-0:2.17.0-131.el9fdp
Fixed · RHBA-2024:1226
Fast Datapath for Red Hat Enterprise Linux 9
openvswitch3.1-0:3.1.0-88.el9fdp
Fixed · RHSA-2024:1227
Fast Datapath for Red Hat Enterprise Linux 9
openvswitch3.2-0:3.2.0-56.el9fdp
Fixed · RHBA-2024:1228
Fast Datapath for RHEL 7
openvswitch
Affected
Fast Datapath for RHEL 7
openvswitch2.10
Out of support scope
Fast Datapath for RHEL 7
openvswitch2.11
Out of support scope
Fast Datapath for RHEL 7
openvswitch2.12
Out of support scope
Fast Datapath for RHEL 7
openvswitch2.13
Out of support scope
Fast Datapath for RHEL 7
openvswitch2.15
Out of support scope
Fast Datapath for RHEL 8
openvswitch2.11
Out of support scope
Fast Datapath for RHEL 8
openvswitch2.12
Out of support scope
Fast Datapath for RHEL 8
openvswitch2.13
Out of support scope
Fast Datapath for RHEL 8
openvswitch2.15
Out of support scope
Fast Datapath for RHEL 8
openvswitch2.16
Out of support scope
Fast Datapath for RHEL 9
openvswitch3.0
Out of support scope
Red Hat Enterprise Linux 7
openvswitch
Will not fix
Red Hat OpenShift Container Platform 3.11
openvswitch-ovn-kubernetes
Out of support scope
Red Hat OpenStack Platform 16.1
rhosp-openvswitch
Not affected
Red Hat OpenStack Platform 16.2
rhosp-openvswitch
Not affected
Red Hat Virtualization 4
openvswitch2.11
Affected
Red Hat Virtualization 4
redhat-virtualization-host
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Fast Datapath for Red Hat Enterprise Linux 8 | openvswitch2.17-0:2.17.0-148.el8fdp | Fixed | RHSA-2024:1234 |
| Fast Datapath for Red Hat Enterprise Linux 8 | openvswitch3.1-0:3.1.0-96.el8fdp | Fixed | RHSA-2024:1235 |
| Fast Datapath for Red Hat Enterprise Linux 9 | openvswitch2.17-0:2.17.0-131.el9fdp | Fixed | RHBA-2024:1226 |
| Fast Datapath for Red Hat Enterprise Linux 9 | openvswitch3.1-0:3.1.0-88.el9fdp | Fixed | RHSA-2024:1227 |
| Fast Datapath for Red Hat Enterprise Linux 9 | openvswitch3.2-0:3.2.0-56.el9fdp | Fixed | RHBA-2024:1228 |
| Fast Datapath for RHEL 7 | openvswitch | Affected | n/a |
| Fast Datapath for RHEL 7 | openvswitch2.10 | Out of support scope | n/a |
| Fast Datapath for RHEL 7 | openvswitch2.11 | Out of support scope | n/a |
| Fast Datapath for RHEL 7 | openvswitch2.12 | Out of support scope | n/a |
| Fast Datapath for RHEL 7 | openvswitch2.13 | Out of support scope | n/a |
| Fast Datapath for RHEL 7 | openvswitch2.15 | Out of support scope | n/a |
| Fast Datapath for RHEL 8 | openvswitch2.11 | Out of support scope | n/a |
| Fast Datapath for RHEL 8 | openvswitch2.12 | Out of support scope | n/a |
| Fast Datapath for RHEL 8 | openvswitch2.13 | Out of support scope | n/a |
| Fast Datapath for RHEL 8 | openvswitch2.15 | Out of support scope | n/a |
| Fast Datapath for RHEL 8 | openvswitch2.16 | Out of support scope | n/a |
| Fast Datapath for RHEL 9 | openvswitch3.0 | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | openvswitch | Will not fix | n/a |
| Red Hat OpenShift Container Platform 3.11 | openvswitch-ovn-kubernetes | Out of support scope | n/a |
| Red Hat OpenStack Platform 16.1 | rhosp-openvswitch | Not affected | n/a |
| Red Hat OpenStack Platform 16.2 | rhosp-openvswitch | Not affected | n/a |
| Red Hat Virtualization 4 | openvswitch2.11 | Affected | n/a |
| Red Hat Virtualization 4 | redhat-virtualization-host | Affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Red Hat Enterprise Linux 7 provides the `openvswitch` package only through the unsupported Optional repository. Customers are advised to install Open vSwitch (OVS) from RHEL Fast Datapath instead. Red Hat OpenStack Platform 13/16 deployments are not affected because they use openvswitch directly from the Fast Datapath channel. A rhosp-openvswitch update will therefore not be provided at this time. Any updates will be distributed through that channel.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
1 other source (Red Hat) ▾
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2023–2026- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (5 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.39% (0.00389) | 30.53th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.39% (0.00392) | 30.73th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.11% (0.00114) | 27.60th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 5.07th | v3 (v2023.03.01) |
| Oct 7, 2023 | 0.04% (0.00042) | 5.68th | v3 (v2023.03.01) |
References (9)
- http://www.openwall.com/lists/oss-security/2024/02/08/4
- https://access.redhat.com/security/cve/CVE-2023-5366 vdb-entryx_refsource_REDHATThird Party AdvisoryVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2006347 issue-trackingx_refsource_REDHATIssue TrackingPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2024/02/msg00004.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LFZADABUDOFI2KZIRQBYFZCIKH55RGY3/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VYYUBF6OW2JG7VOFEOROHXGSJCTES3QO/
- https://mail.openvswitch.org/pipermail/ovs-announce/2024-February/000342.html
- https://nvd.nist.gov/vuln/detail/CVE-2023-5366
- https://www.cve.org/CVERecord?id=CVE-2023-5366
Change history (6)
- MITRE
- CVSS severity changed from MEDIUM to
HIGH MEDIUM → HIGH
- CVSS vector changed from CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N to
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N → CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
- CVSS score changed from 5.5 to
7.1 5.5 → 7.1
- CVSS severity changed from MEDIUM to
HIGH
- REDHAT
- CVSS severity changed from HIGH to
MEDIUM HIGH → MEDIUM
- CVSS vector changed from CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H to
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H → CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- CVSS score changed from 7.1 to
5.5 7.1 → 5.5
- CVSS severity changed from HIGH to
MEDIUM