Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| cilium | cilium | >= v1.13.0, < v1.15.16, >= v1.16.0, < v1.16.9, >= v1.17.0, < v1.17.3 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | govulncheck-vulndb | 0.0.20250422T181640-1.1 | openSUSE-SU-2025:15017-1 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | hubble +1 | 1.17.2-r2 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/cilium/cilium | >= 1.13.0, < 1.15.16 | 1.15.16 | GHSA-5vxx-c285-pcq4 |
| Go | github.com/cilium/cilium | >= 1.16.0, < 1.16.9 | 1.16.9 | GHSA-5vxx-c285-pcq4 |
| Go | github.com/cilium/cilium | >= 1.17.0, < 1.17.3 | 1.17.3 | GHSA-5vxx-c285-pcq4 |
| Go | github.com/cilium/cilium | >= 1.13.0, < 1.15.16 · >= 1.16.0, < 1.16.9 · >= 1.17.0, < 1.17.3 | 1.15.16, 1.16.9, 1.17.3 | GO-2025-3635 |
Advisories 1
- openSUSE-SU-2025:15017-1 govulncheck-vulndb-0.0.20250422T181640-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026