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).
Published: 2026-11-04
Score: 6.3 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 04 Nov 2026 22:00:00 +0000

Type Values Removed Values Added
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).
Title Improper isolation of shared resources in aws-network-policy-agent in Amazon EKS
First Time appeared Aws
Aws amazon-vpc-cni-k8s
Aws aws-network-policy-agent
Weaknesses CWE-1189
CPEs cpe:2.3:a:aws:amazon-vpc-cni-k8s:*:*:*:*:*:*:*:*
cpe:2.3:a:aws:aws-network-policy-agent:*:*:*:*:*:*:*:*
Vendors & Products Aws
Aws amazon-vpc-cni-k8s
Aws aws-network-policy-agent
References
Metrics cvssV3_1

{'score': 8.7, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N'}

cvssV4_0

{'score': 6.3, 'vector': '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'}

Subscriptions

Aws Amazon-vpc-cni-k8s Aws-network-policy-agent
cve-icon MITRE

Status: PUBLISHED

Assigner: AMZN

Published:

Updated: 2026-11-04T21:50:30.839Z

Reserved: 2026-11-04T21:31:28.131Z

Link: CVE-2026-122266

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-04T22:17:56.383

Modified: 2026-11-04T22:17:56.383

Link: CVE-2026-122266

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-1189

    Improper Isolation of Shared Resources on System-on-a-Chip (SoC)