8.7
High
CVE-2026-122266 Improper isolation of shared resources in aws-network-policy-agent in Amazon EKS
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).
CVSS 3.1 detail
Vector CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:NExploitable from the adjacent network, with an ordinary account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.
- Attack vector
- Adjacent network
- Attack complexity
- Low
- Privileges required
- Low
- Interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| aws-network-policy-agent 1.3 | earliest → < 1.3.7 | 1.3.7 |
| amazon-vpc-cni-k8s 1.22 | earliest → < 1.22.3 | 1.22.3 |