FKIE_CVE-2021-47330
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:
tty: serial: 8250: serial_cs: Fix a memory leak in error handling path
In the probe function, if the final 'serial_config()' fails, 'info' is
leaking.
Add a resource handling path to free this memory.
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/tty/serial/8250/serial_cs.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "b5a2799cd62ed30c81b22c23028d9ee374e2138c",
"status": "affected",
"version": "15b99ac1729503db9e6dc642a50b9b6cb3bf51f9",
"versionType": "git"
},
{
"lessThan": "331f5923fce4f45b8170ccf06c529e8eb28f37bc",
"status": "affected",
"version": "15b99ac1729503db9e6dc642a50b9b6cb3bf51f9",
"versionType": "git"
},
{
"lessThan": "34f4590f5ec9859ea9136249f528173d150bd584",
"status": "affected",
"version": "15b99ac1729503db9e6dc642a50b9b6cb3bf51f9",
"versionType": "git"
},
{
"lessThan": "cddee5c287e26f6b2ba5c0ffdfc3a846f2f10461",
"status": "affected",
"version": "15b99ac1729503db9e6dc642a50b9b6cb3bf51f9",
"versionType": "git"
},
{
"lessThan": "ee16bed959862a6de2913f71a04cb563d7237b67",
"status": "affected",
"version": "15b99ac1729503db9e6dc642a50b9b6cb3bf51f9",
"versionType": "git"
},
{
"lessThan": "7a80f71601af015856a0aeb1e3c294037ac3dd32",
"status": "affected",
"version": "15b99ac1729503db9e6dc642a50b9b6cb3bf51f9",
"versionType": "git"
},
{
"lessThan": "c39cf4df19acf0133fa284a8cd83fad42cd13cc2",
"status": "affected",
"version": "15b99ac1729503db9e6dc642a50b9b6cb3bf51f9",
"versionType": "git"
},
{
"lessThan": "b2ef1f5de40342de44fc5355321595f91774dab5",
"status": "affected",
"version": "15b99ac1729503db9e6dc642a50b9b6cb3bf51f9",
"versionType": "git"
},
{
"lessThan": "fad92b11047a748c996ebd6cfb164a63814eeb2e",
"status": "affected",
"version": "15b99ac1729503db9e6dc642a50b9b6cb3bf51f9",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/tty/serial/8250/serial_cs.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.17"
},
{
"lessThan": "2.6.17",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.4.*",
"status": "unaffected",
"version": "4.4.276",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.9.*",
"status": "unaffected",
"version": "4.9.276",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"version": "4.14.240",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.198",
"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": [
{
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"versionEndExcluding": "4.4.276",
"vulnerable": true
},
{
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],
"negate": false,
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]
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],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: serial: 8250: serial_cs: Fix a memory leak in error handling path\n\nIn the probe function, if the final \u0027serial_config()\u0027 fails, \u0027info\u0027 is\nleaking.\n\nAdd a resource handling path to free this memory."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tty: serial: 8250: serial_cs: corrige una p\u00e9rdida de memoria en la ruta de manejo de errores. En la funci\u00f3n de sonda, si el \u0027serial_config()\u0027 final falla, se est\u00e1 perdiendo \u0027info\u0027. Agregue una ruta de manejo de recursos para liberar esta memoria."
}
],
"id": "CVE-2021-47330",
"lastModified": "2026-06-17T04:17:12.767",
"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": [
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"ssvcData": {
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"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
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}
],
"role": "CISA Coordinator",
"timestamp": "2024-09-10T15:39:02.923985Z",
"version": "2.0.3"
}
}
]
},
"published": "2024-05-21T15:15:19.977",
"references": [
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],
"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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