How severe is CVE-2026-34992?

CVE-2026-34992 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-34992 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34992?

CVE-2026-34992 affects Linuxfoundation Antrea. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34992?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-34992 have an EU (EUVD) identifier?

Yes. CVE-2026-34992 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19368.

When was CVE-2026-34992 published?

CVE-2026-34992 was published on 2026-04-06 and last updated on 2026-06-17.

CVE-2026-34992

CVE-2026-34992 is a high-severity vulnerability in Linuxfoundation Antrea with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-311.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 7.1
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19368
Weakness: CWE-311
Affected product: Linuxfoundation Antrea
Published: 2026-04-06
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-34992?: 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.
How severe is CVE-2026-34992?: CVE-2026-34992 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-34992 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34992?: CVE-2026-34992 affects Linuxfoundation Antrea. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34992?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-34992 have an EU (EUVD) identifier?: Yes. CVE-2026-34992 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19368.
When was CVE-2026-34992 published?: CVE-2026-34992 was published on 2026-04-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:linuxfoundation:antrea:*:*:*:*:*:kubernetes:*:*

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