Auth bypass in Antrea-Io Antrea
CVE-2026-25804
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (46.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.006 · change: +0.001
Affected products
- Antrea-Io Antrea — versions < 2.3.2, >= 2.4.0, < 2.4.3
- Linuxfoundation Antrea
Weakness classification (CWE)
References
- github.com/antrea-io/antrea/security/advisories/GHSA-86x4-wp9f-wrr9 (Patch, Vendor Advisory)
- github.com/antrea-io/antrea/pull/7496 (Patch, Issue Tracking)
- github.com/antrea-io/antrea/commit/86c4b6010f3be536866f339b632621c23d7186fa (Patch)
Frequently asked questions
- What is CVE-2026-25804?
- CVE-2026-25804 is a critical-severity vulnerability in Antrea-Io Antrea, classified under Improper Authentication. CVSS score: 9.1/10. Published 2026-02-06.
- How severe is CVE-2026-25804?
- Critical severity. CVSS v3 base score is 9.1 out of 10.