CVE-2026-34992 Details
Description
Antrea is a Kubernetes networking solution intended to be Kubernetes native. Prior to 2.4.5 and 2.5.2, a missing encryption vulnerability affects inter-Node Pod traffic. In Antrea clusters configured for dual-stack networking with IPsec encryption enabled (trafficEncryptionMode: ipsec), Antrea fails to apply encryption for IPv6 Pod traffic. While the IPv4 traffic is correctly encrypted via ESP (Encapsulating Security Payload), traffic using IPv6 is transmitted in plaintext. This occurs because the packets are encapsulated (using Geneve or VXLAN) but bypass the IPsec encryption layer. Impacted Users: users with dual-stack clusters and IPsec encryption enabled. Single-stack IPv4 or IPv6 clusters are not affected. This vulnerability is fixed in 2.4.5 and 2.5.2.
A vulnerability exists in Antrea, a Kubernetes networking solution, prior to versions 2.4.5 and 2.5.2. In clusters configured for dual-stack networking with IPsec encryption enabled, Antrea fails to encrypt IPv6 Pod traffic between Nodes. While IPv4 traffic is properly encrypted, IPv6 packets are sent in plaintext, bypassing the IPsec encryption layer. This issue affects users with dual-stack clusters and IPsec encryption enabled, but not those with single-stack IPv4 or IPv6 clusters.
Users should upgrade to Antrea versions 2.4.5, 2.5.2, or 2.6.0 and later. After upgrading, it's recommended to run the 'antctl check installation --run ipsec' command to verify that both IPv4 and IPv6 traffic are correctly encrypted.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 7, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-311 | Missing Encryption of Sensitive Data | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linuxfoundation antrea | < 2.4.5 >= 2.5.0, < 2.5.2 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 27, 2026 | Initial Analysis | [email protected] |
| Apr 6, 2026 | New CVE Received | [email protected] |