High advisory for Improper isolation of shared resources i

Advisory overview

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).

Related references

• https://aws.amazon.com/security/security-bulletins/2026-170-aws/
• https://github.com/aws/amazon-vpc-cni-k8s/releases/tag/v1.22.3
• https://github.com/aws/aws-network-policy-agent/releases/tag/v1.3.7
• https://github.com/aws/aws-network-policy-agent/security/advisories/GHSA-mm5f-ggvx-hmvw