CVE-2025-32793

Impact

### Impact When using [Wireguard transparent encryption](https://docs.cilium.io/en/stable/security/network/encryption-wireguard/#encryption-wg) 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. ### Patches This issue has been patched in https://github.com/cilium/cilium/pull/38592. This issue affects: - Cilium v1.15 between v1.15.0 and v1.15.15 inclusive - Cilium v1.16 between v1.16.0 and v1.16.8 inclusive - Cilium v1.17 between v1.17.0 and v1.17.2 inclusive This issue is fixed in: - Cilium v1.15.16 - Cilium v1.16.9 - Cilium v1.17.3 ### Workarounds There is no workaround to this issue. ### Acknowledgements The Cilium community has worked together with members of Isovalent to prepare these mitigations. Special thanks to @gandro and @pippolo84 for reporting this issue and to @julianwiedmann for the patch. ### For more information If you think you have found a vulnerability affecting Cilium, we strongly encourage you to report it to our security mailing list at [security@cilium.io](mailto:security@cilium.io). This is a private mailing list for the Cilium security team, and your report will be treated as top priority.

Affected packages

Affected products

Weakness classification

References

• NVD record
• CVE.org record
• GitHub advisory
• https://github.com/cilium/cilium/pull/38592
• https://github.com/cilium/cilium/security/advisories/GHSA-5vxx-c285-pcq4
• https://github.com/advisories/GHSA-5vxx-c285-pcq4
• https://github.com/cilium/cilium/commit/e8543eef05126e9ba8a845dc74e96f4e30f6dba9
• https://nvd.nist.gov/vuln/detail/CVE-2025-32793