aws-network-policy-agent: Improper Isolation of Shared Resources on System-on-a-Chip (SoC)
CVE-2026-122266 is a high-severity improper isolation of shared resources on system-on-a-chip (soc) vulnerability in aws-network-policy-agent from AWS, with a CVSS 3.1 base score of 8.7 out of 10. It can be exploited from the same local network by an attacker with a low-privileged account, without any action from a user. The record lists version 1.3.7 as the first without the flaw, so updating aws-network-policy-agent to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.27% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update aws-network-policy-agent to 1.3.7 or a later version.
- Update amazon-vpc-cni-k8s to 1.22.3 or a later version.
- Read the advisory on aws.amazon.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| AWS | aws-network-policy-agent | before 1.3.7 | 1.3.7 |
| AWS | amazon-vpc-cni-k8s | before 1.22.3 | 1.22.3 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- AdjacentThe attacker must be on the same local network segment.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- ChangedThe attack can reach beyond the vulnerable component into other systems.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N. Scored by CNA.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 6.3 | Medium | CNA |
| CVSS 3.1 | 8.7 | High | CNA |
Official 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).
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Isolation of Shared Resources on System-on-a-Chip (SoC)
The System-On-a-Chip (SoC) does not properly isolate shared resources between trusted and untrusted agents.
How developers prevent this class of flaw
- When sharing resources, avoid mixing agents of varying trust levels. Untrusted agents should not share resources with trusted agents.
More Improper Isolation of Shared Resources on System-on-a-Chip (SoC) vulnerabilities (CWE-1189)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Advisories
Patches and release notes
Other vulnerabilities in aws-network-policy-agent
- 8.7 High severity
Recent Improper Isolation of Shared Resources on System-on-a-Chip (SoC) vulnerabilities
- 7.0 High severity
- 7.2 High severity
- 7.8 High severity
- 7.8 High severity
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