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
EPSS: 0.004 (36.3th percentile) — read the EPSS interpretation.
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.
Affected products
- Antrea-io Antrea — versions < 2.3.2, >= 2.4.0, < 2.4.3
- Linuxfoundation Antrea
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (Patch, x_refsource_MISC)
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.