VULNERABILITY INTELLIGENCE
CVE-2025-64715
CVSS score4 MEDIUM
EPSS probability0.18%
CISA KEVNot currently listed
Published2025-11-29
Last modified2026-10-19
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Description
Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Prior to versions 1.16.17, 1.17.10, and 1.18.4, CiliumNetworkPolicys which use egress.toGroups.aws.securityGroupsIds to reference AWS security group IDs that do not exist or are not attached to any network interface may unintentionally allow broader outbound access than intended by the policy authors. In such cases, the toCIDRset section of the derived policy is not generated, which means outbound traffic may be permitted to more destinations than originally intended. This issue has been patched in versions 1.16.17, 1.17.10, and 1.18.4. There are no workarounds for this issue.
Weakness classification
- security-advisories@github.com: CWE-284
- nvd@nist.gov: NVD-CWE-noinfo
Primary references
- security-advisories@github.com — Patch
- security-advisories@github.com — Release Notes
- security-advisories@github.com — Release Notes
- security-advisories@github.com — Release Notes
- security-advisories@github.com — Patch, Vendor Advisory