CVE-2021-45486
Estado: ModificadaBaja (3.5)—
In the IPv4 implementation in the Linux kernel before 5.12.4, net/ipv4/route.c has an information leak because the hash table is very small.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- Puntuación base: 3.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.37%
- Percentil entre todas las CVEs puntuadas: 28
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (4)
CWE
- CWE-327
Referencias
- https://arxiv.org/pdf/2112.09604.pdf
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/net/ipv4/route.c?id=aa6dd211e4b1dde9d5dc25d699d35f789ae7eeba
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://arxiv.org/pdf/2112.09604.pdf
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/net/ipv4/route.c?id=aa6dd211e4b1dde9d5dc25d699d35f789ae7eeba
- https://www.oracle.com/security-alerts/cpujul2022.html
JSON original (NVD)
Mostrar
{
"id": "CVE-2021-45486",
"cveTags": [],
"metrics": {
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 2.7,
"accessVector": "ADJACENT_NETWORK",
"vectorString": "AV:A/AC:L/Au:S/C:P/I:N/A:N",
"authentication": "SINGLE",
"integrityImpact": "NONE",
"accessComplexity": "LOW",
"availabilityImpact": "NONE",
"confidentialityImpact": "PARTIAL"
},
"acInsufInfo": false,
"impactScore": 2.9,
"baseSeverity": "LOW",
"obtainAllPrivilege": false,
"exploitabilityScore": 5.1,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 3.5,
"attackVector": "ADJACENT_NETWORK",
"baseSeverity": "LOW",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "LOW",
"confidentialityImpact": "LOW"
},
"impactScore": 1.4,
"exploitabilityScore": 2.1
}
]
},
"affected": [
{
"source": "cve@mitre.org",
"affectedData": [
{
"vendor": "n/a",
"product": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
]
}
],
"published": "2021-12-25T02:15:06.710",
"references": [
{
"url": "https://arxiv.org/pdf/2112.09604.pdf",
"tags": [
"Technical Description",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/net/ipv4/route.c?id=aa6dd211e4b1dde9d5dc25d699d35f789ae7eeba",
"tags": [
"Patch",
"Vendor Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://www.oracle.com/security-alerts/cpujul2022.html",
"tags": [
"Patch",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://arxiv.org/pdf/2112.09604.pdf",
"tags": [
"Technical Description",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/net/ipv4/route.c?id=aa6dd211e4b1dde9d5dc25d699d35f789ae7eeba",
"tags": [
"Patch",
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.oracle.com/security-alerts/cpujul2022.html",
"tags": [
"Patch",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-327"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the IPv4 implementation in the Linux kernel before 5.12.4, net/ipv4/route.c has an information leak because the hash table is very small."
},
{
"lang": "es",
"value": "En la implementación de IPv4 en el kernel de Linux versiones anteriores a 5.12.4, el archivo net/ipv4/route.c presenta un filtrado de información porque la tabla hash es muy pequeña"
}
],
"lastModified": "2026-06-17T04:13:29.340",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "02E3EF5C-8618-4945-A6A6-D7C1A416754F",
"versionEndExcluding": "5.12.4"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:22.1.3:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "6EDB6772-7FDB-45FF-8D72-952902A7EE56"
},
{
"criteria": "cpe:2.3:a:oracle:communications_cloud_native_core_network_exposure_function:22.1.1:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9955F62A-75D3-4347-9AD3-5947FC365838"
},
{
"criteria": "cpe:2.3:a:oracle:communications_cloud_native_core_policy:22.2.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7A6D77C7-A2F4-4700-AB5A-3EC853496ECA"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "cve@mitre.org"
}