# CVE-2026-122266: Improper isolation of shared resources in aws-network-policy-agent in Amazon EKS

> CVE-2026-122266: Improper isolation of shared resources in aws-network-policy-agent in Amazon EKS. CVSS 8.7 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-122266
Last updated: 2026-11-09T22:18:35Z

- Published: 2026-11-04 21:44 UTC · Updated: 2026-11-09 22:18 UTC · Assigner: AMZN
- CVSS: 8.7 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
- EPSS: 0.27%, 20th percentile (scored 2026-11-10)
- CISA KEV: no
- CWE: CWE-1189

## 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 vendors and products

- AWS: amazon-vpc-cni-k8s
- AWS: aws-network-policy-agent

## Tracked companies

- [Amazon Web Services](https://rewindex.com/company/aws.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-122266)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-122266)
- [https://aws.amazon.com/security/security-bulletins/2026-170-aws/](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/amazon-vpc-cni-k8s/releases/tag/v1.22.3)
- [https://github.com/aws/amazon-vpc-cni-k8s/security/advisories/GHSA-rp3x-m95q-87mx](https://github.com/aws/amazon-vpc-cni-k8s/security/advisories/GHSA-rp3x-m95q-87mx)
- [https://github.com/aws/aws-network-policy-agent/releases/tag/v1.3.7](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](https://github.com/aws/aws-network-policy-agent/security/advisories/GHSA-mm5f-ggvx-hmvw)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-122266 · Markdown: https://rewindex.com/cve/CVE-2026-122266.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-122266 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-11T04:21:58.303Z