FKIE_CVE-2021-47548
Vulnerability from fkie_nvd - Published: 2024-05-24 15:15 - Updated: 2026-06-17 04:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved:
ethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port()
The if statement:
if (port >= DSAF_GE_NUM)
return;
limits the value of port less than DSAF_GE_NUM (i.e., 8).
However, if the value of port is 6 or 7, an array overflow could occur:
port_rst_off = dsaf_dev->mac_cb[port]->port_rst_off;
because the length of dsaf_dev->mac_cb is DSAF_MAX_PORT_NUM (i.e., 6).
To fix this possible array overflow, we first check port and if it is
greater than or equal to DSAF_MAX_PORT_NUM, the function returns.
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 | 5.16 |
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "948968f8747650447c8f21c9fdba0e1973be040b",
"status": "affected",
"version": "850bfa3b78ea8849fef78ed74f5f2ccf947db0ca",
"versionType": "git"
},
{
"lessThan": "abbd5faa0748d0aa95d5191d56ff7a17a6275bd1",
"status": "affected",
"version": "850bfa3b78ea8849fef78ed74f5f2ccf947db0ca",
"versionType": "git"
},
{
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"status": "affected",
"version": "850bfa3b78ea8849fef78ed74f5f2ccf947db0ca",
"versionType": "git"
},
{
"lessThan": "99bb25cb6753beaf2c2bc37927c2ecc0ceff3f6d",
"status": "affected",
"version": "850bfa3b78ea8849fef78ed74f5f2ccf947db0ca",
"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
},
{
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"status": "affected",
"version": "850bfa3b78ea8849fef78ed74f5f2ccf947db0ca",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.7"
},
{
"lessThan": "4.7",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.9.*",
"status": "unaffected",
"version": "4.9.292",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"version": "4.14.257",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.220",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.164",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.84",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.7",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "5.16",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"affectedData": [
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
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"status": "affected",
"version": "1da177e4c3f4",
"versionType": "custom"
}
]
},
{
"cpes": [
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],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThan": "abbd5faa0748",
"status": "affected",
"version": "1da177e4c3f4",
"versionType": "custom"
}
]
},
{
"cpes": [
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],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
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"status": "affected",
"version": "1da177e4c3f4",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
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"version": "1da177e4c3f4",
"versionType": "custom"
}
]
},
{
"cpes": [
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],
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"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
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"version": "1da177e4c3f4",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThan": "fc7ffa7f10b9",
"status": "affected",
"version": "1da177e4c3f4",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThan": "a66998e0fbf2",
"status": "affected",
"version": "1da177e4c3f4",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThanOrEqual": "4.9.*",
"status": "unaffected",
"version": "4.9.292",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThanOrEqual": "4.14*",
"status": "unaffected",
"version": "4.14.257",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.220",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.164",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.84",
"versionType": "custom"
}
]
},
{
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],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
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"status": "unaffected",
"version": "5.15.7",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"status": "unaffected",
"version": "5.16"
}
]
}
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
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],
"negate": false,
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}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port()\n\nThe if statement:\n if (port \u003e= DSAF_GE_NUM)\n return;\n\nlimits the value of port less than DSAF_GE_NUM (i.e., 8).\nHowever, if the value of port is 6 or 7, an array overflow could occur:\n port_rst_off = dsaf_dev-\u003emac_cb[port]-\u003eport_rst_off;\n\nbecause the length of dsaf_dev-\u003emac_cb is DSAF_MAX_PORT_NUM (i.e., 6).\n\nTo fix this possible array overflow, we first check port and if it is\ngreater than or equal to DSAF_MAX_PORT_NUM, the function returns."
},
{
"lang": "es",
"value": "En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: ethernet: hisilicon: hns: hns_dsaf_misc: corrige un posible desbordamiento de matriz en hns_dsaf_ge_srst_by_port() La sentencia if: if (port \u0026gt;= DSAF_GE_NUM) return; limita el valor del puerto a menos de DSAF_GE_NUM (es decir, 8). Sin embargo, si el valor del puerto es 6 o 7, podr\u00eda producirse un desbordamiento de la matriz: port_rst_off = dsaf_dev-\u0026gt;mac_cb[port]-\u0026gt;port_rst_off; porque la longitud de dsaf_dev-\u0026gt;mac_cb es DSAF_MAX_PORT_NUM (es decir, 6). Para solucionar este posible desbordamiento de la matriz, primero verificamos el puerto y si es mayor o igual a DSAF_MAX_PORT_NUM, la funci\u00f3n regresa."
}
],
"id": "CVE-2021-47548",
"lastModified": "2026-06-17T04:17:44.320",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 5.9,
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2021-47548",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-06-05T14:45:02.339644Z",
"version": "2.0.3"
}
}
]
},
"published": "2024-05-24T15:15:19.693",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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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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"url": "https://git.kernel.org/stable/c/fc7ffa7f10b9454a86369405d9814bf141b30627"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-129"
}
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"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.
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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