CVE-2026-25804
Antrea has invalid enforcement order for network policy rules caused by integer overflow
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.
INFO
Published Date :
Feb. 6, 2026, 11:15 p.m.
Last Modified :
Feb. 28, 2026, 12:30 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update Antrea to version 2.4.3 or later.
- Verify network policy enforcement after update.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-25804.
| URL | Resource |
|---|---|
| https://github.com/antrea-io/antrea/commit/86c4b6010f3be536866f339b632621c23d7186fa | Patch |
| https://github.com/antrea-io/antrea/pull/7496 | Issue Tracking Patch |
| https://github.com/antrea-io/antrea/security/advisories/GHSA-86x4-wp9f-wrr9 | Patch Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-25804 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-25804
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-25804 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-25804 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Feb. 28, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H Added CPE Configuration OR *cpe:2.3:a:linuxfoundation:antrea:*:*:*:*:*:kubernetes:*:* versions up to (excluding) 2.3.2 *cpe:2.3:a:linuxfoundation:antrea:*:*:*:*:*:kubernetes:*:* versions from (including) 2.4.0 up to (excluding) 2.4.3 Added Reference Type GitHub, Inc.: https://github.com/antrea-io/antrea/commit/86c4b6010f3be536866f339b632621c23d7186fa Types: Patch Added Reference Type GitHub, Inc.: https://github.com/antrea-io/antrea/pull/7496 Types: Issue Tracking, Patch Added Reference Type GitHub, Inc.: https://github.com/antrea-io/antrea/security/advisories/GHSA-86x4-wp9f-wrr9 Types: Patch, Vendor Advisory -
New CVE Received by [email protected]
Feb. 06, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-287 Added CWE CWE-770 Added Reference https://github.com/antrea-io/antrea/commit/86c4b6010f3be536866f339b632621c23d7186fa Added Reference https://github.com/antrea-io/antrea/pull/7496 Added Reference https://github.com/antrea-io/antrea/security/advisories/GHSA-86x4-wp9f-wrr9