CVE-2019-14821 (GCVE-0-2019-14821)
Vulnerability from cvelistv5 – Published: 2019-09-19 17:37 – Updated: 2024-08-05 00:26
VLAI
EPSS
VEX
Summary
An out-of-bounds access issue was found in the Linux kernel, all versions through 5.3, in the way Linux kernel's KVM hypervisor implements the Coalesced MMIO write operation. It operates on an MMIO ring buffer 'struct kvm_coalesced_mmio' object, wherein write indices 'ring->first' and 'ring->last' value could be supplied by a host user-space process. An unprivileged host user or process with access to '/dev/kvm' device could use this flaw to crash the host kernel, resulting in a denial of service or potentially escalating privileges on the system.
Severity
7.5 (High)
CWE
Assigner
References
29 references
Impacted products
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"vulnerable": true
},
{
"criteria": "cpe:2.3:a:oracle:sd-wan_edge:8.0:*:*:*:*:*:*:*",
"matchCriteriaId": "5AA39D06-1089-42C8-95C5-28EBD6CAB0DD",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:oracle:sd-wan_edge:8.1:*:*:*:*:*:*:*",
"matchCriteriaId": "27861B29-8BF0-4E44-B22B-A1BE6CF30072",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:oracle:sd-wan_edge:8.2:*:*:*:*:*:*:*",
"matchCriteriaId": "78C99571-0F3C-43E6-84B3-7D80E045EF8E",
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}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "An out-of-bounds access issue was found in the Linux kernel, all versions through 5.3, in the way Linux kernel\u0027s KVM hypervisor implements the Coalesced MMIO write operation. It operates on an MMIO ring buffer \u0027struct kvm_coalesced_mmio\u0027 object, wherein write indices \u0027ring-\u003efirst\u0027 and \u0027ring-\u003elast\u0027 value could be supplied by a host user-space process. An unprivileged host user or process with access to \u0027/dev/kvm\u0027 device could use this flaw to crash the host kernel, resulting in a denial of service or potentially escalating privileges on the system."
},
{
"lang": "es",
"value": "Se encontr\u00f3 un problema de acceso fuera de l\u00edmites en el kernel de Linux, todas las versiones hasta 5.3, en la manera en que el hipervisor KVM del kernel de Linux implementa la operaci\u00f3n de escritura MMIO Coalesced. Opera en un objeto MMIO ring buffer \"struct kvm_coalesced_mmio\", en donde los \u00edndices de escritura \"ring-)first\" y \"ring-)last\" podr\u00edan ser suministrados por un proceso de espacio de usuario del host. Un usuario o proceso host no privilegiado con acceso al dispositivo \"/dev/kvm\" podr\u00eda usar esta falla para bloquear el kernel host, resultando en una denegaci\u00f3n de servicio o la escalada de manera potencial de los privilegios en el sistema."
}
],
"id": "CVE-2019-14821",
"lastModified": "2024-11-21T04:27:25.990",
"metrics": {
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{
"acInsufInfo": false,
"baseSeverity": "HIGH",
"cvssData": {
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"accessVector": "LOCAL",
"authentication": "NONE",
"availabilityImpact": "COMPLETE",
"baseScore": 7.2,
"confidentialityImpact": "COMPLETE",
"integrityImpact": "COMPLETE",
"vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
"version": "2.0"
},
"exploitabilityScore": 3.9,
"impactScore": 10.0,
"obtainAllPrivilege": false,
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"source": "nvd@nist.gov",
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"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H",
"version": "3.0"
},
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"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
},
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},
"published": "2019-09-19T18:15:10.700",
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"redhat_vex": {
"aggregate_severity": "Important",
"current_release_date": "2026-06-28T11:32:30+00:00",
"cve": "CVE-2019-14821",
"id": "CVE-2019-14821",
"initial_release_date": "2019-09-17T17:00:00+00:00",
"product_status:fixed": "755",
"product_status:known_affected": "17",
"product_status:known_not_affected": "18",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "Kernel: KVM: OOB memory access via mmio ring buffer",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2019/cve-2019-14821.json",
"version": "3"
},
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"aggregate_severity": "moderate",
"current_release_date": "2026-09-04T00:53:50Z",
"cve": "CVE-2019-14821",
"id": "CVE-2019-14821",
"initial_release_date": "2023-02-15T04:09:28Z",
"product_status:known_affected": "139",
"product_status:known_not_affected": "55",
"product_status:recommended": "977",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2019-14821",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2019-14821.json",
"version": "24"
}
}
}
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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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