CVE-2026-122266 PUBLISHED

Improper isolation of shared resources in aws-network-policy-agent in Amazon EKS

Assigner: AMZN
Reserved: 04.11.2026 Published: 04.11.2026 Updated: 04.11.2026

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).

CVSS Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
CVSS Score: 8.7

Attack Vector	Adjacent Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	None

CVSS 3.1

CVSS 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
CVSS Score: 6.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Adjacent	Confidentiality	None	Confidentiality	High
Attack Complexity	Low	Integrity	None	Integrity	High
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	AWS
Product	aws-network-policy-agent
Versions	Default: unaffected affected from 0 to 1.3.7 (excl.)

Vendor	AWS
Product	amazon-vpc-cni-k8s
Versions	Default: unaffected affected from 0 to 1.22.3 (excl.)

CVE-2026-122266 PUBLISHED

Improper isolation of shared resources in aws-network-policy-agent in Amazon EKS

Metrics

Product Status

References

Problem Types

Impacts