CVE-2026-122266

medium

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).

References

https://github.com/aws/aws-network-policy-agent/security/advisories/GHSA-mm5f-ggvx-hmvw

https://github.com/aws/aws-network-policy-agent/releases/tag/v1.3.7

https://github.com/aws/amazon-vpc-cni-k8s/security/advisories/GHSA-rp3x-m95q-87mx

https://github.com/aws/amazon-vpc-cni-k8s/releases/tag/v1.22.3

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-117182

https://aws.amazon.com/security/security-bulletins/2026-170-aws/

Details

Source: Mitre, NVD

Published: 2026-11-04

Updated: 2026-11-12

Risk Information

CVSS v2

Base Score: 7.1

Vector: CVSS2#AV:A/AC:L/Au:S/C:C/I:C/A:N

Severity: High

CVSS v3

Base Score: 8.7

Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Severity: High

CVSS v4

Base 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

Severity: Medium

EPSS

EPSS: 0.00272