Vulnerability in Cilium
CVE-2025-32793
Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Versions 1.15.0 to 1.15.15, 1.16.0 to 1.16.8, and 1.17.0 to 1.17.2, are vulnerable when using Wireguard transparent encryption in a Cilium cluster, packets that originate from a terminating endpoint can leave the source node without encryption due to a race condition in how traffic is processed by Cilium. This issue has been patched in versions 1.15.16, 1.16.9, and 1.17.3. There are no workarounds available for this issue.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.001 (2.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 2.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000
Affected products
- Cilium — versions >= v1.13.0, < v1.15.16, >= v1.16.0, < v1.16.9, >= v1.17.0, < v1.17.3
Weakness classification (CWE)
References
- github.com/cilium/cilium/security/advisories/GHSA-5vxx-c285-pcq4 (Patch, Third Party Advisory)
- github.com/cilium/cilium/pull/38592 (Patch)
Frequently asked questions
- What is CVE-2025-32793?
- CVE-2025-32793 is a medium-severity vulnerability in Cilium, classified under Cleartext Transmission of Sensitive Information. CVSS score: 4.0/10. Published 2025-04-21.
- How severe is CVE-2025-32793?
- Medium severity. CVSS v3 base score is 4.0 out of 10.