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).

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact High

Subsequent System Integrity Impact High

Subsequent System Availability Impact None

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
AWS aws-network-policy-agent unaffected
Version Status Constraints
0 affected < 1.3.7
AWS amazon-vpc-cni-k8s unaffected
Version Status Constraints
0 affected < 1.22.3

No data.

No data.

No data.

Project Subscriptions

Vendors Products
Aws Subscribe
Amazon-vpc-cni-k8s Subscribe
Aws-network-policy-agent Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://aws.amazon.com/security/security-bulletins/2026-170-aws/ cve-icon cve-icon
https://github.com/aws/amazon-vpc-cni-k8s/releases/tag/v1.22.3 cve-icon cve-icon
https://github.com/aws/aws-network-policy-agent/releases/tag/v1.3.7 cve-icon cve-icon
https://github.com/aws/aws-network-policy-agent/security/advisories/GHSA-mm5f-ggvx-hmvw cve-icon cve-icon
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'}

Projects

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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