Ovn: egress acls may be bypassed via specially crafted udp packet
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.1epss 0.9%
exploitation probability
0.9%top 43% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
ovnRed Hat · Fast Datapath for Red Hat Enterprise Linux 8Red Hat · Fast Datapath for Red Hat Enterprise Linux 9Red Hat · Red Hat OpenShift Container Platform 4References
https://access.redhat.com/errata/RHSA-2025:1083https://access.redhat.com/errata/RHSA-2025:1084https://access.redhat.com/errata/RHSA-2025:1085https://access.redhat.com/errata/RHSA-2025:1086https://access.redhat.com/errata/RHSA-2025:1087https://access.redhat.com/errata/RHSA-2025:1088https://access.redhat.com/errata/RHSA-2025:1089https://access.redhat.com/errata/RHSA-2025:1090https://access.redhat.com/errata/RHSA-2025:1091https://access.redhat.com/errata/RHSA-2025:1092https://access.redhat.com/errata/RHSA-2025:1093https://access.redhat.com/errata/RHSA-2025:1094