FKIE_CVE-2021-47325
Vulnerability from fkie_nvd - Published: 2024-05-21 15:15 - Updated: 2026-06-17 04:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved:
iommu/arm-smmu: Fix arm_smmu_device refcount leak in address translation
The reference counting issue happens in several exception handling paths
of arm_smmu_iova_to_phys_hard(). When those error scenarios occur, the
function forgets to decrease the refcount of "smmu" increased by
arm_smmu_rpm_get(), causing a refcount leak.
Fix this issue by jumping to "out" label when those error scenarios
occur.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * |
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/iommu/arm/arm-smmu/arm-smmu.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "b11220803ad14a2a880cc06d8e01fe2548cc85b0",
"status": "affected",
"version": "d4a44f0750bb9bf7c44c22444a482756b2344a79",
"versionType": "git"
},
{
"lessThan": "43d1aaa1965f9b58035196dac49b1e1e6c9c25eb",
"status": "affected",
"version": "d4a44f0750bb9bf7c44c22444a482756b2344a79",
"versionType": "git"
},
{
"lessThan": "0f0c5ea09139777d90729d408b807021f2ea6492",
"status": "affected",
"version": "d4a44f0750bb9bf7c44c22444a482756b2344a79",
"versionType": "git"
},
{
"lessThan": "5f9741a9a91f25c89e04b408cd61e3ab050ce24b",
"status": "affected",
"version": "d4a44f0750bb9bf7c44c22444a482756b2344a79",
"versionType": "git"
},
{
"lessThan": "7c8f176d6a3fa18aa0f8875da6f7c672ed2a8554",
"status": "affected",
"version": "d4a44f0750bb9bf7c44c22444a482756b2344a79",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/iommu/arm/arm-smmu/arm-smmu.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.0"
},
{
"lessThan": "5.0",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.134",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.52",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.12.*",
"status": "unaffected",
"version": "5.12.19",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.13.*",
"status": "unaffected",
"version": "5.13.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "5.14",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "E8906CE9-ED5B-4D67-A356-65A3B757C7A7",
"versionEndExcluding": "5.4.134",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "7C1E6FB6-53C8-4DC4-8AE5-93094BA39F62",
"versionEndExcluding": "5.10.52",
"versionStartIncluding": "5.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "34C1A2F4-DD44-4CF1-8FD4-751A0D746A9E",
"versionEndExcluding": "5.12.19",
"versionStartIncluding": "5.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "F93FA3CC-0C79-410B-A7D7-245C2AA0723A",
"versionEndExcluding": "5.13.4",
"versionStartIncluding": "5.13",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/arm-smmu: Fix arm_smmu_device refcount leak in address translation\n\nThe reference counting issue happens in several exception handling paths\nof arm_smmu_iova_to_phys_hard(). When those error scenarios occur, the\nfunction forgets to decrease the refcount of \"smmu\" increased by\narm_smmu_rpm_get(), causing a refcount leak.\n\nFix this issue by jumping to \"out\" label when those error scenarios\noccur."
},
{
"lang": "es",
"value": " En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: iommu/arm-smmu: corrige la fuga de recuento de referencias de arm_smmu_device en la traducci\u00f3n de direcciones. El problema de recuento de referencias ocurre en varias rutas de manejo de excepciones de arm_smmu_iova_to_phys_hard(). Cuando ocurren esos escenarios de error, la funci\u00f3n se olvida de disminuir el recuento de \"smmu\" aumentado en arm_smmu_rpm_get(), lo que provoca una fuga de recuento. Solucione este problema saltando a la etiqueta \"out\" cuando se produzcan esos escenarios de error."
}
],
"id": "CVE-2021-47325",
"lastModified": "2026-06-17T04:17:12.083",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2021-47325",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-05-21T17:39:49.383659Z",
"version": "2.0.3"
}
}
]
},
"published": "2024-05-21T15:15:19.613",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/0f0c5ea09139777d90729d408b807021f2ea6492"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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"url": "https://git.kernel.org/stable/c/43d1aaa1965f9b58035196dac49b1e1e6c9c25eb"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"url": "https://git.kernel.org/stable/c/5f9741a9a91f25c89e04b408cd61e3ab050ce24b"
},
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"url": "https://git.kernel.org/stable/c/7c8f176d6a3fa18aa0f8875da6f7c672ed2a8554"
},
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},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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"url": "https://git.kernel.org/stable/c/0f0c5ea09139777d90729d408b807021f2ea6492"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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"url": "https://git.kernel.org/stable/c/43d1aaa1965f9b58035196dac49b1e1e6c9c25eb"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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],
"url": "https://git.kernel.org/stable/c/5f9741a9a91f25c89e04b408cd61e3ab050ce24b"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/7c8f176d6a3fa18aa0f8875da6f7c672ed2a8554"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/b11220803ad14a2a880cc06d8e01fe2548cc85b0"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-Other"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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Nomenclature
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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