CVE-2025-0650

Ovn: egress acls may be bypassed via specially crafted udp packet

Published Jan 23, 2025 CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed
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.

Remediation

Vendor Workaround

Red Hat Product Security has not identified any mitigations at this time. We recommend updating to a known patched version of OVN.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-1804 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.
Ubuntu USN Ubuntu USN USN-7396-1 OVN vulnerability
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
CPEs cpe:/o:redhat:enterprise_linux:7::fastdatapath
Type Values Removed Values Added
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.
Title Ovn: egress acls may be bypassed via specially crafted udp packet
First Time appeared Redhat
Redhat enterprise Linux
Redhat openshift
Weaknesses CWE-284
CPEs cpe:/a:redhat:openshift:4
cpe:/o:redhat:enterprise_linux:7::fastdatapath
cpe:/o:redhat:enterprise_linux:8::fastdatapath
cpe:/o:redhat:enterprise_linux:9::fastdatapath
Vendors & Products Redhat
Redhat enterprise Linux
Redhat openshift
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Nov 20, 2025, 7:25 AM
Reserved
Jan 22, 2025, 3:37 PM
Status
Deferred
Published
Jan 23, 2025, 5:15 PM
Modified
Jun 17, 2026, 8:26 AM
Severity
Important
Public date
Jan 21, 2024, 12:00 AM