Vulnerability-Lookup

FKIE_CVE-2021-3392

Vulnerability from fkie_nvd - Published: 2021-03-23 20:15 - Updated: 2026-06-17 04:05

Severity

3.2 (Low) - CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L

Summary

A use-after-free flaw was found in the MegaRAID emulator of QEMU. This issue occurs while processing SCSI I/O requests in the case of an error mptsas_free_request() that does not dequeue the request object 'req' from a pending requests queue. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. Versions between 2.10.0 and 5.2.0 are potentially affected.

References

URL	Tags
secalert@redhat.com	https://bugs.launchpad.net/qemu/+bug/1914236	Exploit, Third Party Advisory
secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=1924042	Issue Tracking, Patch, Third Party Advisory
secalert@redhat.com	https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html	Third Party Advisory
secalert@redhat.com	https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html	Mailing List, Third Party Advisory
secalert@redhat.com	https://security.netapp.com/advisory/ntap-20210507-0001/	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://bugs.launchpad.net/qemu/+bug/1914236	Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://bugzilla.redhat.com/show_bug.cgi?id=1924042	Issue Tracking, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://security.netapp.com/advisory/ntap-20210507-0001/	Third Party Advisory

Impacted products

Vendor	Product	Version
qemu	qemu	*
fedoraproject	fedora	33
debian	debian_linux	9.0
debian	debian_linux	10.0

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "QEMU",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "between 2.10.0 and 5.2.0"
            }
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        }
      ],
      "source": "secalert@redhat.com"
    }
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  "configurations": [
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      "nodes": [
        {
          "cpeMatch": [
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              "versionEndIncluding": "5.2.0",
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              "vulnerable": true
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              "vulnerable": true
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          "operator": "OR"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A use-after-free flaw was found in the MegaRAID emulator of QEMU. This issue occurs while processing SCSI I/O requests in the case of an error mptsas_free_request() that does not dequeue the request object \u0027req\u0027 from a pending requests queue. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. Versions between 2.10.0 and 5.2.0 are potentially affected."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 un fallo de uso de la memoria previamente liberada en el emulador MegaRAID de QEMU.\u0026#xa0;Este problema ocurre mientras se procesan peticiones de I/O SCSI en el caso de un error en la funci\u00f3n mptsas_free_request() que no saca de la cola el objeto de petici\u00f3n \"req\" desde una cola de peticiones pendientes.\u0026#xa0;Este fallo permite a un usuario invitado privilegiado bloquear el proceso QEMU en el host, resultando en una denegaci\u00f3n de servicio.\u0026#xa0;Las versiones entre 2.10.0 y 5.2.0 est\u00e1n potencialmente afectadas"
    }
  ],
  "id": "CVE-2021-3392",
  "lastModified": "2026-06-17T04:05:00.957",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "LOW",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 2.1,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
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          "scope": "CHANGED",
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  "published": "2021-03-23T20:15:13.440",
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  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Modified",
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        {
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        }
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      "type": "Secondary"
    },
    {
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          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2021-3392 (GCVE-0-2021-3392)

Vulnerability from cvelistv5 – Published: 2021-03-23 19:07 – Updated: 2024-08-03 16:53

Summary

Severity

No CVSS data available.

CWE

CWE-416

Assigner

redhat redhat root

References

5 references

URL	Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1924042	x_refsource_MISC
https://bugs.launchpad.net/qemu/+bug/1914236	x_refsource_MISC
https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST
https://security.netapp.com/advisory/ntap-2021050…	x_refsource_CONFIRM
https://lists.debian.org/debian-lts-announce/2022…	mailing-listx_refsource_MLIST

Impacted products

1 product

Vendor	Product	Version
n/a	QEMU	Affected: between 2.10.0 and 5.2.0

Show details on NVD website

JSON

To clipboard

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        ],
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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.

Detection rules are retrieved from Rulezet.

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.

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.