FKIE_CVE-2026-45254
Vulnerability from fkie_nvd - Published: 2026-05-21 10:16 - Updated: 2026-07-23 16:10
Severity
Summary
In the case of the cap_net service, when a key present in the old limit was omitted from the new limit, the missing key was treated as "allow any" instead of being rejected.
In certain scenarios, an application that had previously restricted a subset of network operations could ask for a new limit that extended the permissions of the process.
References
| URL | Tags | ||
|---|---|---|---|
| secteam@freebsd.org | https://security.freebsd.org/advisories/FreeBSD-SA-26:24.cap_net.asc | Vendor Advisory |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| freebsd | freebsd | 14.3 | |
| freebsd | freebsd | 14.3 | |
| freebsd | freebsd | 14.3 | |
| freebsd | freebsd | 14.3 | |
| freebsd | freebsd | 14.3 | |
| freebsd | freebsd | 14.3 | |
| freebsd | freebsd | 14.3 | |
| freebsd | freebsd | 14.3 | |
| freebsd | freebsd | 14.3 | |
| freebsd | freebsd | 14.3 | |
| freebsd | freebsd | 14.3 | |
| freebsd | freebsd | 14.3 | |
| freebsd | freebsd | 14.3 | |
| freebsd | freebsd | 14.3 | |
| freebsd | freebsd | 14.4 | |
| freebsd | freebsd | 14.4 | |
| freebsd | freebsd | 14.4 | |
| freebsd | freebsd | 14.4 | |
| freebsd | freebsd | 14.4 | |
| freebsd | freebsd | 14.4 | |
| freebsd | freebsd | 15.0 | |
| freebsd | freebsd | 15.0 | |
| freebsd | freebsd | 15.0 | |
| freebsd | freebsd | 15.0 | |
| freebsd | freebsd | 15.0 | |
| freebsd | freebsd | 15.0 | |
| freebsd | freebsd | 15.0 | |
| freebsd | freebsd | 15.0 | |
| freebsd | freebsd | 15.0 |
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unknown",
"modules": [
"libcap_net"
],
"product": "FreeBSD",
"vendor": "FreeBSD",
"versions": [
{
"lessThan": "p9",
"status": "affected",
"version": "15.0-RELEASE",
"versionType": "release"
},
{
"lessThan": "p5",
"status": "affected",
"version": "14.4-RELEASE",
"versionType": "release"
},
{
"lessThan": "p14",
"status": "affected",
"version": "14.3-RELEASE",
"versionType": "release"
}
]
}
],
"source": "secteam@freebsd.org"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
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"matchCriteriaId": "9DC7C54E-58AF-4ADE-84AF-0EF0F325E20E",
"vulnerable": true
},
{
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"matchCriteriaId": "D3D22B8C-36CF-4800-9673-0B0240558BDD",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p10:*:*:*:*:*:*",
"matchCriteriaId": "7296F5AA-F8C1-4277-A4EE-C2B24073A320",
"vulnerable": true
},
{
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"matchCriteriaId": "C30E4A9C-0594-4F40-92B3-26CB9AA85AE9",
"vulnerable": true
},
{
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"matchCriteriaId": "9F83F91B-587A-433C-99DB-0D63E267FF16",
"vulnerable": true
},
{
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"matchCriteriaId": "44B9C2FC-756E-459F-8E68-C2C2B8C258AC",
"vulnerable": true
},
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"matchCriteriaId": "242FA2A8-5D7D-4617-A411-2651FF3A3E4C",
"vulnerable": true
},
{
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"matchCriteriaId": "40573F60-F3B7-4AEC-846A-B08E5B7D9D00",
"vulnerable": true
},
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"vulnerable": true
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"matchCriteriaId": "9A785F8E-C218-41AE-8D57-BF06DDAEF7CB",
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"vulnerable": true
},
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"matchCriteriaId": "DC8A75D0-148A-427A-9783-45477EABED21",
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},
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},
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},
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},
{
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},
{
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},
{
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"vulnerable": true
},
{
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"matchCriteriaId": "2C9768AE-9954-4B2A-9525-D7D4942406E7",
"vulnerable": true
},
{
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"matchCriteriaId": "F8B9EF55-3755-452A-B067-043803099B22",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the case of the cap_net service, when a key present in the old limit was omitted from the new limit, the missing key was treated as \"allow any\" instead of being rejected.\n\nIn certain scenarios, an application that had previously restricted a subset of network operations could ask for a new limit that extended the permissions of the process."
},
{
"lang": "es",
"value": "En el caso del servicio cap_net, cuando una clave presente en el l\u00edmite antiguo se omit\u00eda del nuevo l\u00edmite, la clave faltante se trataba como \u0027permitir cualquiera\u0027 en lugar de ser rechazada.\n\nEn ciertos escenarios, una aplicaci\u00f3n que hab\u00eda restringido previamente un subconjunto de operaciones de red podr\u00eda solicitar un nuevo l\u00edmite que extend\u00eda los permisos del proceso."
}
],
"id": "CVE-2026-45254",
"lastModified": "2026-07-23T16:10:00.137",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 2.5,
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-45254",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-21T14:35:55.800907Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-05-21T10:16:26.380",
"references": [
{
"source": "secteam@freebsd.org",
"tags": [
"Vendor Advisory"
],
"url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:24.cap_net.asc"
}
],
"sourceIdentifier": "secteam@freebsd.org",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-269"
}
],
"source": "secteam@freebsd.org",
"type": "Secondary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- 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.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- 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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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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