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CVE-2026-25804

Linuxfoundation Antrea authentication bypass

9.1 CRITICALEPSS 0.65%
  1. Published6 Feb 2026

Description

Antrea is a Kubernetes networking solution intended to be Kubernetes native. Prior to versions 2.3.2 and 2.4.3, Antrea's network policy priority assignment system has a uint16 arithmetic overflow bug that causes incorrect OpenFlow priority calculations when handling a large numbers of policies with various priority values. This results in potentially incorrect traffic enforcement. This issue has been patched in versions 2.4.3.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected products

Linuxfoundation Antrea≥ 2.4.0 < 2.4.3 · < 2.3.2

Remediation

Fixed in
Linuxfoundation Antrea≥ 2.4.3

References

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Frequently asked

Is CVE-2026-25804 being actively exploited?

CVE-2026-25804 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.65%.

How severe is CVE-2026-25804?

CVE-2026-25804 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.65% probability of exploitation.

Which products are affected by CVE-2026-25804?

Affected products include Linuxfoundation Antrea.

How do I fix CVE-2026-25804?

Upgrade affected software to a fixed version, for example Linuxfoundation Antrea 2.4.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-25804 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.