Vulnerability Description
Cilium is a networking, observability, and security solution with an eBPF-based dataplane. A denial of service vulnerability affects versions 1.14.0 through 1.14.7, 1.15.0 through 1.15.11, and 1.16.0 through 1.16.4. In a Kubernetes cluster where Cilium is configured to proxy DNS traffic, an attacker can crash Cilium agents by sending a crafted DNS response to workloads from outside the cluster. For traffic that is allowed but without using DNS-based policy, the dataplane will continue to pass traffic as configured at the time of the DoS. For workloads that have DNS-based policy configured, existing connections may continue to operate, and new connections made without relying on DNS resolution may continue to be established, but new connections which rely on DNS resolution may be disrupted. Any configuration changes that affect the impacted agent may not be applied until the agent is able to restart. This issue is fixed in Cilium v1.14.18, v1.15.12, and v1.16.5. No known workarounds are available.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cilium | Cilium | >= 1.14.0, < 1.14.18 |
Related Weaknesses (CWE)
References
- https://github.com/cilium/cilium/pull/36252Patch
- https://github.com/cilium/cilium/security/advisories/GHSA-9m5p-c77c-f9j7Third Party Advisory
FAQ
What is CVE-2025-23028?
CVE-2025-23028 is a vulnerability with a CVSS score of 5.3 (MEDIUM). Cilium is a networking, observability, and security solution with an eBPF-based dataplane. A denial of service vulnerability affects versions 1.14.0 through 1.14.7, 1.15.0 through 1.15.11, and 1.16.0 ...
How severe is CVE-2025-23028?
CVE-2025-23028 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-23028?
Check the references section above for vendor advisories and patch information. Affected products include: Cilium Cilium.