Vulnerability · Published Apr 21, 2025 · Assigned by GitHub_M

CVE-2025-32793Cilium packets from terminating endpoints may not be encrypted in Wireguard-enabled clusters

Medium 4.0

In plain English

A medium-severity security flaw in cilium from cilium. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.0Medium

Exploit odds (30 days)0.1%top 96.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/cilium/cilium	1.15.16	GHSA-5vxx-c285-pcq4
Go	github.com/cilium/cilium	1.16.9	GHSA-5vxx-c285-pcq4
Go	github.com/cilium/cilium	1.17.3	GHSA-5vxx-c285-pcq4
Go	github.com/cilium/cilium	1.15.16, 1.16.9, 1.17.3	GO-2025-3635

Affected products (as reported)

Vendor	Product	Versions
cilium	cilium	>= v1.13.0, < v1.15.16>= v1.16.0, < v1.16.9>= v1.17.0, < v1.17.3

Weakness: CWE-319 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N

References

https://github.com/cilium/cilium/security/advisories/GHSA-5vxx-c285-pcq4 x_refsource_CONFIRM
https://github.com/cilium/cilium/pull/38592 x_refsource_MISC