CVE-2025-0650: Improper Access Control
Source CVE Database V5
Not known to be exploited · CVSS 8.1 High.
Data as of 25 Oct 2026, 19:02 UTC
- EPSS
- 0.8% chance of exploitation in 30 days – higher than 58% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 23 Jan 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.
What to do
AI-suggested
1. Monitor network traffic for unusual UDP packets that could indicate attempts to exploit the ACL bypass. 2. Implement strict network segmentation to limit the exposure of logical switches configured with DNS records and egress ACLs. 3. Restrict administrative access to OVN configurations and audit changes regularly. 4. Employ host-based firewalls and intrusion detection/prevention systems to detect and block suspicious UDP traffic. 5. Temporarily disable or limit the use of DNS records on logical switches with egress ACLs until patches are available. 6. Coordinate with OVN vendors and open-source communities to obtain and apply patches promptly once released. 7. Conduct penetration testing and vulnerability assessments focused on OVN network configurations to identify and remediate weaknesses. 8. Educate network and cloud administrators about this vulnerability and the importance of secure OVN configuration.
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.
References
- access.redhat.com/errata/RHSA-2025:1083 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:1084 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:1085 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:1086 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:1087 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:1088 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:1089 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:1090 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:1091 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:1092 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:1093 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:1094 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:1095 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:1096 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:1097 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2025-0650 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2339537 (opens in a new tab)
- openwall.com/lists/oss-security/2025/01/22/5 (opens in a new tab)
- openwall.com/lists/oss-security/2025/01/22/11 (opens in a new tab)