CVE-2025-30163

Node based network policies may incorrectly allow workload traffic

Description

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Node based network policies (`fromNodes` and `toNodes`) will incorrectly permit traffic to/from non-node endpoints that share the labels specified in `fromNodes` and `toNodes` sections of network policies. Node based network policy is disabled by default in Cilium. This issue affects: Cilium v1.16 between v1.16.0 and v1.16.7 inclusive and v1.17 between v1.17.0 and v1.17.1 inclusive. This issue is fixed in Cilium v1.16.8 and v1.17.2. Users can work around this issue by ensuring that the labels used in `fromNodes` and `toNodes` fields are used exclusively by nodes and not by other endpoints.

Category

3.4
CVSS
Severity: Low
CVSS 3.1 •
EPSS 0.03%
Affected: cilium cilium
Published at:
Updated at:

References

Link Tags
https://github.com/cilium/cilium/security/advisories/GHSA-c6pf-2v8j-96mc
https://github.com/cilium/cilium/pull/36657
https://docs.cilium.io/en/stable/security/policy/language/#node-based

Frequently Asked Questions

What is the severity of CVE-2025-30163?
CVE-2025-30163 has been scored as a low severity vulnerability.
How to fix CVE-2025-30163?
To fix CVE-2025-30163, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-30163 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-30163 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-30163?
CVE-2025-30163 affects cilium cilium.
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