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CVE-2025-0650— Ovn: egress acls may be bypassed via specially crafted udp packet

Quick assessment

Affected
Red Hat Fast Datapath for Red Hat Enterprise Linux 8
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Open Virtual Network（OVN）是Open Virtual Network开源的一个开放虚拟网络。 Open Virtual Network (OVN)存在安全漏洞，该漏洞源于特别构造的UDP数据包可绕过出口ACL，导致虚拟机和容器被未授权访问。

CVSS 8.1 · High EPSS 0.86% · P57

Possible ATT&CK Techniques 1 AI

T1041 · Exfiltration Over C2 Channel
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I. Basic Information for CVE-2025-0650

Vulnerability Information
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Vulnerability Title
Ovn: egress acls may be bypassed via specially crafted udp packet
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Open Virtual Network 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open Virtual Network（OVN）是Open Virtual Network开源的一个开放虚拟网络。 Open Virtual Network (OVN)存在安全漏洞，该漏洞源于特别构造的UDP数据包可绕过出口ACL，导致虚拟机和容器被未授权访问。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Fast Datapath for Red Hat Enterprise Linux 8 0:22.03.7-11.el8fdp ~ * cpe:/o:redhat:enterprise_linux:8::fastdatapath
Red Hat Fast Datapath for Red Hat Enterprise Linux 8 0:22.06.0-273.el8fdp ~ * cpe:/o:redhat:enterprise_linux:8::fastdatapath
Red Hat Fast Datapath for Red Hat Enterprise Linux 8 0:22.09.2-86.el8fdp ~ * cpe:/o:redhat:enterprise_linux:8::fastdatapath
Red Hat Fast Datapath for Red Hat Enterprise Linux 8 0:22.12.1-107.el8fdp ~ * cpe:/o:redhat:enterprise_linux:8::fastdatapath
Red Hat Fast Datapath for Red Hat Enterprise Linux 8 0:23.03.3-22.el8fdp ~ * cpe:/o:redhat:enterprise_linux:8::fastdatapath
Red Hat Fast Datapath for Red Hat Enterprise Linux 8 0:23.06.4-26.el8fdp ~ * cpe:/o:redhat:enterprise_linux:8::fastdatapath
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 0:22.03.7-11.el9fdp ~ * cpe:/o:redhat:enterprise_linux:9::fastdatapath
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 0:22.06.0-273.el9fdp ~ * cpe:/o:redhat:enterprise_linux:9::fastdatapath
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 0:22.09.2-86.el9fdp ~ * cpe:/o:redhat:enterprise_linux:9::fastdatapath
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 0:22.12.1-107.el9fdp ~ * cpe:/o:redhat:enterprise_linux:9::fastdatapath
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 0:23.03.3-22.el9fdp ~ * cpe:/o:redhat:enterprise_linux:9::fastdatapath
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 0:23.06.4-26.el9fdp ~ * cpe:/o:redhat:enterprise_linux:9::fastdatapath
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 0:23.09.6-12.el9fdp ~ * cpe:/o:redhat:enterprise_linux:9::fastdatapath
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 0:24.03.4-53.el9fdp ~ * cpe:/o:redhat:enterprise_linux:9::fastdatapath
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 0:24.09.1-66.el9fdp ~ * cpe:/o:redhat:enterprise_linux:9::fastdatapath
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2025-0650

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III. Intelligence Information for CVE-2025-0650

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Vendor Advisories for CVE-2025-0650 (17)

Mailing List Discussions for CVE-2025-0650 (1)

IV. Related Vulnerabilities

Same weakness: CWE-284

V. Comments for CVE-2025-0650

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