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Fencer Vulns
medium 4.0

CVE-2025-32793 json

Cilium packets from terminating endpoints may not be encrypted in Wireguard-enabled clusters

published 2025-04-21 18 mo ago modified 2026-09-10 1 mo ago also BIT-cilium-2025-32793 , BIT-cilium-operator-2025-32793 , BIT-hubble-relay-2025-32793 , EUVD-2025-12230 , GHSA-5vxx-c285-pcq4 , GO-2025-3635

cvss
4.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 3%
public exploits
0
none known

Summary

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.

Patch / fix

  • go github.com/cilium/cilium 1.15.16, 1.16.9, 1.17.3
  • bitnami cilium 1.17.3
  • bitnami cilium-operator 1.17.3
  • bitnami hubble-relay 1.17.3
  • cilium cilium 1.15.16, 1.16.9, 1.17.3
  • govulncheck-vulndb openSUSE Tumbleweed 0.0.20250422T181640-1.1

opensuse advisories openSUSE-SU-2025:15017-1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
18 mo ago

Exploit prediction

0.14% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.0 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N
GitHub 3.1 4.0 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N
NVD 3.1 4.0 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N
OSV 3.1 4.0 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
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
bitnami cilium
>=1.13.0, <1.17.3
1.17.3
bitnami cilium-operator
>=1.13.0, <1.17.3
1.17.3
bitnami hubble-relay
>=1.13.0, <1.17.3
1.17.3

Affected products

  • cilium cilium

Classification

Weakness
  • CWE-319 Cleartext Transmission of Sensitive Information
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.