CVE-2026-122266
Improper isolation of shared resources in aws-network-policy-agent in Amazon EKS
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).
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: AMZNFix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: AMZNAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| aws-network-policy-agent AWS |
≥ 0; < 1.3.7 (affected, custom)
Other versions: unaffected |
CNA: AMZN |
| amazon-vpc-cni-k8s AWS |
≥ 0; < 1.22.3 (affected, custom)
Other versions: unaffected |
CNA: AMZN |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 8.7 high |
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N | CNA: AMZN |
| 4.0 / 6.3 medium |
CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N | CNA: AMZN |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/aws/aws-network-policy-agent/releases/tag/v1.3.7CNA: AMZN · release-notes, patch
- https://github.com/aws/amazon-vpc-cni-k8s/releases/tag/v1.22.3CNA: AMZN · release-notes, patch
- https://aws.amazon.com/security/security-bulletins/2026-170-aws/CNA: AMZN · vendor-advisory
- https://github.com/aws/aws-network-policy-agent/security/advisories/GHSA-mm5f-ggvx-hmvwCNA: AMZN · third-party-advisory
For agents and automation
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