Vulnerability-Lookup

CVE-2026-25804 (GCVE-0-2026-25804)

Vulnerability from cvelistv5 – Published: 2026-02-06 22:58 – Updated: 2026-02-09 15:25

Title

Antrea has invalid enforcement order for network policy rules caused by integer overflow

Summary

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.

Severity

8 (High)


                        
                          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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-02-09 15:21 UTC

CWE

CWE-287 - Improper Authentication
CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7771 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/antrea-io/antrea/security/advi…	x_refsource_CONFIRM
https://github.com/antrea-io/antrea/pull/7496	x_refsource_MISC
https://github.com/antrea-io/antrea/commit/86c4b6…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
antrea-io	antrea	Affected: < 2.3.2 Affected: >= 2.4.0, < 2.4.3	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-25804

Vulnerability from fkie_nvd - Published: 2026-02-06 23:15 - Updated: 2026-06-17 10:25

Severity

9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/antrea-io/antrea/commit/86c4b6010f3be536866f339b632621c23d7186fa	Patch
security-advisories@github.com	https://github.com/antrea-io/antrea/pull/7496	Issue Tracking, Patch
security-advisories@github.com	https://github.com/antrea-io/antrea/security/advisories/GHSA-86x4-wp9f-wrr9	Patch, Vendor Advisory

Impacted products

	Vendor	Product	Version
	linuxfoundation	antrea	*
	linuxfoundation	antrea	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "antrea",
          "vendor": "antrea-io",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.3.2"
            },
            {
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              "version": "\u003e= 2.4.0, \u003c 2.4.3"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
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              "versionEndExcluding": "2.3.2",
              "vulnerable": true
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            {
              "criteria": "cpe:2.3:a:linuxfoundation:antrea:*:*:*:*:*:kubernetes:*:*",
              "matchCriteriaId": "7DB4CD72-9C1A-47E2-BB11-16F803BAE15A",
              "versionEndExcluding": "2.4.3",
              "versionStartIncluding": "2.4.0",
              "vulnerable": true
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          ],
          "negate": false,
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    },
    {
      "lang": "es",
      "value": "Antrea es una soluci\u00f3n de red de Kubernetes dise\u00f1ada para ser nativa de Kubernetes. Antes de las versiones 2.3.2 y 2.4.3, el sistema de asignaci\u00f3n de prioridad de pol\u00edticas de red de Antrea tiene un error de desbordamiento aritm\u00e9tico uint16 que causa c\u00e1lculos incorrectos de prioridad de OpenFlow al manejar un gran n\u00famero de pol\u00edticas con varios valores de prioridad. Esto resulta en una aplicaci\u00f3n de tr\u00e1fico potencialmente incorrecta. Este problema ha sido parcheado en la versi\u00f3n 2.4.3."
    }
  ],
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  "lastModified": "2026-06-17T10:25:16.257",
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        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.0,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "UNREPORTED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "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/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "LOW",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-25804",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-02-09T15:21:46.446442Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-02-06T23:15:55.123",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/antrea-io/antrea/commit/86c4b6010f3be536866f339b632621c23d7186fa"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/antrea-io/antrea/pull/7496"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://github.com/antrea-io/antrea/security/advisories/GHSA-86x4-wp9f-wrr9"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        },
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-86X4-WP9F-WRR9

Vulnerability from github – Published: 2026-02-06 22:36 – Updated: 2026-02-07 00:33

Summary

Antrea has invalid enforcement order for network policy rules caused by integer overflow

Details

Impact

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.

If a user creates a large number of Antrea NetworkPolicies (ANP or ACNP) with varying priorities, some rules with lower logical priorities (higher numerical priority values) may take precedence over rules with higher logical priorities (lower numerical priority values). Traffic that should be denied by the configured Antrea NetworkPolicies may end up being allowed, potentially letting an attacker access a sensitive service. Traffic that should be allowed by the configured Antrea NetworkPolicies may end up being denied, breaking applications and potentially opening the door for denial-of-service attacks.

The Antrea NetworkPolicy system comes with support for priority Tiers. Rules defined within a Tier cannot take precedence over rules defined in higher priority Tiers. Some users / roles may only be authorized to define within specific Tiers. This security vulnerability enables such users to intentionally "escape" their Tier and override rules in higher priority Tiers.

Antrea deployments that only use upstream Kubernetes NetworkPolicies - and do not use Antrea NetworkPolicies - are not affected.

Patches

https://github.com/antrea-io/antrea/pull/7496 Antrea v2.5.0 Antrea v2.4.3 Antrea v2.3.2

Workarounds

Antrea deployments that only use upstream Kubernetes NetworkPolicies - and do not use Antrea NetworkPolicies - are not affected.

For users leveraging Antrea NetworkPolicies, there is no way to fix or remediate the vulnerability without upgrading.

Resources

https://gist.github.com/antoninbas/c429cc3e5bb8479ba7ff38fd6fde59d9 https://github.com/antrea-io/antrea/pull/7496 https://github.com/antrea-io/antrea/blob/main/docs/antrea-network-policy.md

Severity

8.0 (High)


                  
                    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

Show details on source website

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "antrea.io/antrea"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "antrea.io/antrea"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.4.0"
            },
            {
              "fixed": "2.4.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-25804"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287",
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-06T22:36:29Z",
    "nvd_published_at": "2026-02-06T23:15:55Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n\nAntrea\u0027s 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.\n\nIf a user creates a large number of Antrea NetworkPolicies (ANP or ACNP) with varying priorities, some rules with lower logical priorities (higher numerical priority values) may take precedence over rules with higher logical priorities (lower numerical priority values). Traffic that should be denied by the configured Antrea NetworkPolicies may end up being allowed, potentially letting an attacker access a sensitive service. Traffic that should be allowed by the configured Antrea NetworkPolicies may end up being denied, breaking applications and potentially opening the door for denial-of-service attacks.\n\nThe Antrea NetworkPolicy system comes with support for priority Tiers. Rules defined within a Tier cannot take precedence over rules defined in higher priority Tiers. Some users / roles may only be authorized to define within specific Tiers. This security vulnerability enables such users to intentionally \"escape\" their Tier and override rules in higher priority Tiers.\n\nAntrea deployments that *only* use upstream Kubernetes NetworkPolicies - and do not use Antrea NetworkPolicies - are not affected.\n\n### Patches\nhttps://github.com/antrea-io/antrea/pull/7496\nAntrea v2.5.0\nAntrea v2.4.3\nAntrea v2.3.2\n\n### Workarounds\n\nAntrea deployments that *only* use upstream Kubernetes NetworkPolicies - and do not use Antrea NetworkPolicies - are not affected.\n\nFor users leveraging Antrea NetworkPolicies, there is no way to fix or remediate the vulnerability without upgrading.\n\n### Resources\n\nhttps://gist.github.com/antoninbas/c429cc3e5bb8479ba7ff38fd6fde59d9\nhttps://github.com/antrea-io/antrea/pull/7496\nhttps://github.com/antrea-io/antrea/blob/main/docs/antrea-network-policy.md",
  "id": "GHSA-86x4-wp9f-wrr9",
  "modified": "2026-02-07T00:33:42Z",
  "published": "2026-02-06T22:36:29Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/antrea-io/antrea/security/advisories/GHSA-86x4-wp9f-wrr9"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-25804"
    },
    {
      "type": "WEB",
      "url": "https://github.com/antrea-io/antrea/pull/7496"
    },
    {
      "type": "WEB",
      "url": "https://github.com/antrea-io/antrea/commit/86c4b6010f3be536866f339b632621c23d7186fa"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/antoninbas/c429cc3e5bb8479ba7ff38fd6fde59d9"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/antrea-io/antrea"
    },
    {
      "type": "WEB",
      "url": "https://github.com/antrea-io/antrea/blob/main/docs/antrea-network-policy.md"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Antrea has invalid enforcement order for network policy rules caused by integer overflow"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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CVE-2026-25804 (GCVE-0-2026-25804)

FKIE_CVE-2026-25804

GHSA-86X4-WP9F-WRR9

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