FKIE_CVE-2021-47474
Vulnerability from fkie_nvd - Published: 2024-05-22 09:15 - Updated: 2026-06-17 04:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved:
comedi: vmk80xx: fix bulk-buffer overflow
The driver is using endpoint-sized buffers but must not assume that the
tx and rx buffers are of equal size or a malicious device could overflow
the slab-allocated receive buffer when doing bulk transfers.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * |
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/comedi/drivers/vmk80xx.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "e0e6a63fd97ad95fe05dfd77268a1952551e11a7",
"status": "affected",
"version": "985cafccbf9b7f862aa1c5ee566801e18b5161fb",
"versionType": "git"
},
{
"lessThan": "7cfb35db607760698d299fd1cf7402dfa8f09973",
"status": "affected",
"version": "985cafccbf9b7f862aa1c5ee566801e18b5161fb",
"versionType": "git"
},
{
"lessThan": "0866dcaa828c21bc2f94dac00e086078f11b5772",
"status": "affected",
"version": "985cafccbf9b7f862aa1c5ee566801e18b5161fb",
"versionType": "git"
},
{
"lessThan": "063f576c43d589a4c153554b681d32b3f8317c7b",
"status": "affected",
"version": "985cafccbf9b7f862aa1c5ee566801e18b5161fb",
"versionType": "git"
},
{
"lessThan": "1ae4715121a57bc6fa29fd992127b01907f2f993",
"status": "affected",
"version": "985cafccbf9b7f862aa1c5ee566801e18b5161fb",
"versionType": "git"
},
{
"lessThan": "b7fd7f3387f070215e6be341e68eb5c087eeecc0",
"status": "affected",
"version": "985cafccbf9b7f862aa1c5ee566801e18b5161fb",
"versionType": "git"
},
{
"lessThan": "7b0e356189327287d0eb98ec081bd6dd97068cd3",
"status": "affected",
"version": "985cafccbf9b7f862aa1c5ee566801e18b5161fb",
"versionType": "git"
},
{
"lessThan": "47b4636ebdbeba2044b3db937c4d2b6a4fe3d0f2",
"status": "affected",
"version": "985cafccbf9b7f862aa1c5ee566801e18b5161fb",
"versionType": "git"
},
{
"lessThan": "78cdfd62bd54af615fba9e3ca1ba35de39d3871d",
"status": "affected",
"version": "985cafccbf9b7f862aa1c5ee566801e18b5161fb",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/comedi/drivers/vmk80xx.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.31"
},
{
"lessThan": "2.6.31",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.4.*",
"status": "unaffected",
"version": "4.4.292",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.9.*",
"status": "unaffected",
"version": "4.9.290",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"version": "4.14.255",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.217",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.159",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.79",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.14.*",
"status": "unaffected",
"version": "5.14.18",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.2",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "5.16",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "41FE03A0-D680-4E4E-86C7-020EEF6DCD99",
"versionEndExcluding": "4.4.292",
"versionStartIncluding": "2.6.31",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "85D8337A-4EA1-4787-85EA-4BF4328A9436",
"versionEndExcluding": "4.9.290",
"versionStartIncluding": "4.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "436BD498-0DB1-4290-9A36-A52CB11B3AC3",
"versionEndExcluding": "4.14.255",
"versionStartIncluding": "4.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "01C66D0E-2D4A-45A8-800F-23022B681325",
"versionEndExcluding": "4.19.217",
"versionStartIncluding": "4.15",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "A974BD5C-13A1-4974-B68A-6FD1422F5F3B",
"versionEndExcluding": "5.4.159",
"versionStartIncluding": "4.20",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "AD6F772D-D9E4-4B9B-9E3C-CD5635E9E88D",
"versionEndExcluding": "5.10.79",
"versionStartIncluding": "5.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "B51F6469-3DD9-4E3B-8BD5-2E6911301BF1",
"versionEndExcluding": "5.14.18",
"versionStartIncluding": "5.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "9BFCBC65-4DA5-4C88-B852-E7B052DE9F20",
"versionEndExcluding": "5.15.2",
"versionStartIncluding": "5.15",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncomedi: vmk80xx: fix bulk-buffer overflow\n\nThe driver is using endpoint-sized buffers but must not assume that the\ntx and rx buffers are of equal size or a malicious device could overflow\nthe slab-allocated receive buffer when doing bulk transfers."
},
{
"lang": "es",
"value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: comedi: vmk80xx: corrige el desbordamiento masivo del b\u00fafer El controlador utiliza b\u00faferes del tama\u00f1o de un endpoint, pero no debe asumir que los b\u00faferes tx y rx son del mismo tama\u00f1o o un dispositivo malicioso podr\u00eda desbordar el b\u00fafer de recepci\u00f3n asignado por losa al realizar transferencias masivas."
}
],
"id": "CVE-2021-47474",
"lastModified": "2026-06-17T04:17:33.320",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2021-47474",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-06-10T18:55:02.820898Z",
"version": "2.0.3"
}
}
]
},
"published": "2024-05-22T09:15:09.287",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/063f576c43d589a4c153554b681d32b3f8317c7b"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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},
{
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"tags": [
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{
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],
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},
{
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},
{
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},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
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},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"Patch"
],
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},
{
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],
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},
{
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},
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"tags": [
"Patch"
],
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},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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},
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"tags": [
"Patch"
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"url": "https://git.kernel.org/stable/c/78cdfd62bd54af615fba9e3ca1ba35de39d3871d"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/7b0e356189327287d0eb98ec081bd6dd97068cd3"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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],
"url": "https://git.kernel.org/stable/c/7cfb35db607760698d299fd1cf7402dfa8f09973"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/e0e6a63fd97ad95fe05dfd77268a1952551e11a7"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-787"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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