CVE-2021-38203
Estado: ModificadaMedia (5.5)—
btrfs in the Linux kernel before 5.13.4 allows attackers to cause a denial of service (deadlock) via processes that trigger allocation of new system chunks during times when there is a shortage of free space in the system space_info.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.36%
- 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 (5)
CWE
- CWE-667
Referencias
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4
- https://github.com/torvalds/linux/commit/1cb3db1cf383a3c7dbda1aa0ce748b0958759947
- https://security.netapp.com/advisory/ntap-20210902-0010/
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4
- https://github.com/torvalds/linux/commit/1cb3db1cf383a3c7dbda1aa0ce748b0958759947
- https://security.netapp.com/advisory/ntap-20210902-0010/
JSON original (NVD)
Mostrar
{
"id": "CVE-2021-38203",
"cveTags": [],
"metrics": {
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 2.1,
"accessVector": "LOCAL",
"vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P",
"authentication": "NONE",
"integrityImpact": "NONE",
"accessComplexity": "LOW",
"availabilityImpact": "PARTIAL",
"confidentialityImpact": "NONE"
},
"acInsufInfo": false,
"impactScore": 2.9,
"baseSeverity": "LOW",
"obtainAllPrivilege": false,
"exploitabilityScore": 3.9,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 5.5,
"attackVector": "LOCAL",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 1.8
}
]
},
"affected": [
{
"source": "cve@mitre.org",
"affectedData": [
{
"vendor": "n/a",
"product": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
]
}
],
"published": "2021-08-08T20:15:07.217",
"references": [
{
"url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4",
"tags": [
"Mailing List",
"Patch",
"Vendor Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://github.com/torvalds/linux/commit/1cb3db1cf383a3c7dbda1aa0ce748b0958759947",
"tags": [
"Exploit",
"Patch",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://security.netapp.com/advisory/ntap-20210902-0010/",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4",
"tags": [
"Mailing List",
"Patch",
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://github.com/torvalds/linux/commit/1cb3db1cf383a3c7dbda1aa0ce748b0958759947",
"tags": [
"Exploit",
"Patch",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://security.netapp.com/advisory/ntap-20210902-0010/",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-667"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "btrfs in the Linux kernel before 5.13.4 allows attackers to cause a denial of service (deadlock) via processes that trigger allocation of new system chunks during times when there is a shortage of free space in the system space_info."
},
{
"lang": "es",
"value": "btrfs en el kernel de Linux versiones anteriores a 5.13.4, permite a atacantes causar una denegación de servicio (bloqueo) por medio de procesos que desencadenan la asignación de nuevos trozos del sistema durante los momentos en que hay una escasez de espacio libre en el space_info del sistema"
}
],
"lastModified": "2026-06-17T04:01:45.283",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4C85356F-2C6C-4FB9-B0CA-949711182223",
"versionEndExcluding": "5.13.4"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:netapp:hci_bootstrap_os:-:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1C767AA1-88B7-48F0-9F31-A89D16DCD52C"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "AD7447BC-F315-4298-A822-549942FC118B"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A3C19813-E823-456A-B1CE-EC0684CE1953"
},
{
"criteria": "cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A6E9EF0C-AFA8-4F7B-9FDC-1E0F7C26E737"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:netapp:element_software:-:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "85DF4B3F-4BBC-42B7-B729-096934523D63"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:netapp:hci_storage_node:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "02DEB4FB-A21D-4CB1-B522-EEE5093E8521"
}
],
"operator": "OR"
}
],
"operator": "AND"
}
],
"sourceIdentifier": "cve@mitre.org"
}