FKIE_CVE-2021-33630
Vulnerability from fkie_nvd - Published: 2024-01-18 15:15 - Updated: 2026-06-17 03:54
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5 (Medium) - CVSS:3.1/
Summary
NULL Pointer Dereference vulnerability in openEuler kernel on Linux (network modules) allows Pointer Manipulation. This vulnerability is associated with program files net/sched/sch_cbs.C.
This issue affects openEuler kernel: from 4.19.90 before 4.19.90-2401.3.
References
{
"affected": [
{
"affectedData": [
{
"collectionURL": "https://gitee.com/src-openeuler",
"defaultStatus": "unaffected",
"modules": [
"network"
],
"packageName": "kernel",
"platforms": [
"Linux"
],
"product": "kernel",
"programFiles": [
"https://gitee.com/openeuler/kernel/blob/openEuler-1.0-LTS/net/sched/sch_cbs.c"
],
"repo": "https://gitee.com/src-openeuler/kernel",
"vendor": "openEuler",
"versions": [
{
"changes": [
{
"at": "b2239f607df25fc401179e6dd4b7406f942a7632 net/sched: cbs: Fix not adding cbs instance to list",
"status": "unaffected"
}
],
"lessThan": "4.19.90-2401.3",
"status": "affected",
"version": "4.19.90",
"versionType": "git"
}
]
}
],
"source": "securities@openeuler.org"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:openatom:openeuler:*:*:*:*:-:*:*:*",
"matchCriteriaId": "49C3AB98-66E0-4EC8-A2AB-3E4722C4BFA7",
"versionEndExcluding": "4.19.90-2401.3",
"versionStartIncluding": "4.19.90",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "NULL Pointer Dereference vulnerability in openEuler kernel on Linux (network modules) allows Pointer Manipulation. This vulnerability is associated with program files net/sched/sch_cbs.C.\n\nThis issue affects openEuler kernel: from 4.19.90 before 4.19.90-2401.3."
},
{
"lang": "es",
"value": "La vulnerabilidad de desreferencia de puntero NULL en el kernel openEuler en Linux (m\u00f3dulos de red) permite la manipulaci\u00f3n de puntero. Esta vulnerabilidad est\u00e1 asociada con los archivos de programa net/sched/sch_cbs.C. Este problema afecta al kernel de openEuler: desde 4.19.90 antes de 4.19.90-2401.3."
}
],
"id": "CVE-2021-33630",
"lastModified": "2026-06-17T03:54:53.890",
"metrics": {
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{
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"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"
},
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"impactScore": 3.6,
"source": "securities@openeuler.org",
"type": "Secondary"
},
{
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"baseScore": 5.5,
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"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"
},
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"impactScore": 3.6,
"source": "nvd@nist.gov",
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"ssvcV203": [
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"options": [
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],
"role": "CISA Coordinator",
"timestamp": "2025-05-07T20:14:40.648453Z",
"version": "2.0.3"
}
}
]
},
"published": "2024-01-18T15:15:08.653",
"references": [
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"url": "http://www.openwall.com/lists/oss-security/2024/01/30/10"
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{
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"url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3e8b9bfa110896f95d602d8c98d5f9d67e41d78c"
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{
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},
{
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"tags": [
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],
"url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2024-1030"
},
{
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"url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2024-1031"
},
{
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}
],
"sourceIdentifier": "securities@openeuler.org",
"vulnStatus": "Modified",
"weaknesses": [
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"value": "CWE-476"
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"type": "Primary"
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]
}
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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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