Description
Improper isolation of shared resources in aws-network-policy-agent in Amazon EKS Network Policy Agent before 1.3.7 (VPC CNI before 1.22.3) might allow an authenticated adjacent user to bypass NetworkPolicy ingress enforcement on co-located pods via eBPF conntrack map poisoning using crafted AF_PACKET frames.
To remediate this issue, users should upgrade to Amazon VPC CNI Managed Add-on v1.22.3 or later (which includes Network Policy Agent v1.3.7).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| AWS | aws-network-policy-agent | < 1.3.7 | 1.3.7 |
| AWS | amazon-vpc-cni-k8s | < 1.22.3 | 1.22.3 |
References
- https://github.com/aws/aws-network-policy-agent/releases/tag/v1.3.7 release-notes patch
- https://github.com/aws/amazon-vpc-cni-k8s/releases/tag/v1.22.3 release-notes patch
- https://aws.amazon.com/security/security-bulletins/2026-170-aws/ vendor-advisory
- https://github.com/aws/aws-network-policy-agent/security/advisories/GHSA-mm5f-ggvx-hmvw third-party-advisory
- https://github.com/aws/amazon-vpc-cni-k8s/security/advisories/GHSA-rp3x-m95q-87mx third-party-advisory