Vulnerability-Lookup

FKIE_CVE-2021-3347

Vulnerability from fkie_nvd - Published: 2021-01-29 17:15 - Updated: 2026-06-17 04:04

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

An issue was discovered in the Linux kernel through 5.10.11. PI futexes have a kernel stack use-after-free during fault handling, allowing local users to execute code in the kernel, aka CID-34b1a1ce1458.

References

URL	Tags
cve@mitre.org	http://www.openwall.com/lists/oss-security/2021/01/29/4	Mailing List, Third Party Advisory
cve@mitre.org	http://www.openwall.com/lists/oss-security/2021/01/29/5	Mailing List, Third Party Advisory
cve@mitre.org	http://www.openwall.com/lists/oss-security/2021/02/01/4	Exploit, Mailing List, Third Party Advisory
cve@mitre.org	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=04b79c55201f02ffd675e1231d731365e335c307	Mailing List, Patch, Vendor Advisory
cve@mitre.org	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=12bb3f7f1b03d5913b3f9d4236a488aa7774dfe9	Mailing List, Patch, Vendor Advisory
cve@mitre.org	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2156ac1934166d6deb6cd0f6ffc4c1076ec63697	Mailing List, Patch, Vendor Advisory
cve@mitre.org	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=34b1a1ce1458f50ef27c54e28eb9b1947012907a	Mailing List, Patch, Vendor Advisory
cve@mitre.org	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6ccc84f917d33312eb2846bd7b567639f585ad6d	Mailing List, Patch, Vendor Advisory
cve@mitre.org	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c5cade200ab9a2a3be9e7f32a752c8d86b502ec7	Mailing List, Patch, Vendor Advisory
cve@mitre.org	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c64396cc36c6e60704ab06c1fb1c4a46179c9120	Mailing List, Patch, Vendor Advisory
cve@mitre.org	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f2dac39d93987f7de1e20b3988c8685523247ae2	Mailing List, Patch, Vendor Advisory
cve@mitre.org	https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html	Mailing List, Third Party Advisory
cve@mitre.org	https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html	Mailing List, Third Party Advisory
cve@mitre.org	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CXAVDAK4RLAHBHHGEPL73UFXSI6BXQ7Q/
cve@mitre.org	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QOBMXDJABYE76RKNBAWA2E4TSSBX7CSJ/
cve@mitre.org	https://security.netapp.com/advisory/ntap-20210304-0005/	Third Party Advisory
cve@mitre.org	https://www.debian.org/security/2021/dsa-4843	Third Party Advisory
cve@mitre.org	https://www.openwall.com/lists/oss-security/2021/01/29/1	Mailing List, Third Party Advisory
cve@mitre.org	https://www.openwall.com/lists/oss-security/2021/01/29/3	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2021/01/29/4	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2021/01/29/5	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2021/02/01/4	Exploit, Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=04b79c55201f02ffd675e1231d731365e335c307	Mailing List, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=12bb3f7f1b03d5913b3f9d4236a488aa7774dfe9	Mailing List, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2156ac1934166d6deb6cd0f6ffc4c1076ec63697	Mailing List, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=34b1a1ce1458f50ef27c54e28eb9b1947012907a	Mailing List, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6ccc84f917d33312eb2846bd7b567639f585ad6d	Mailing List, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c5cade200ab9a2a3be9e7f32a752c8d86b502ec7	Mailing List, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c64396cc36c6e60704ab06c1fb1c4a46179c9120	Mailing List, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f2dac39d93987f7de1e20b3988c8685523247ae2	Mailing List, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CXAVDAK4RLAHBHHGEPL73UFXSI6BXQ7Q/
af854a3a-2127-422b-91ae-364da2661108	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QOBMXDJABYE76RKNBAWA2E4TSSBX7CSJ/
af854a3a-2127-422b-91ae-364da2661108	https://security.netapp.com/advisory/ntap-20210304-0005/	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.debian.org/security/2021/dsa-4843	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.openwall.com/lists/oss-security/2021/01/29/1	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.openwall.com/lists/oss-security/2021/01/29/3	Mailing List, Third Party Advisory

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
debian	debian_linux	9.0
debian	debian_linux	10.0
fedoraproject	fedora	32
fedoraproject	fedora	33

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F3799B16-F59A-4B31-AD7E-2A0D899DBC1C",
              "versionEndIncluding": "5.10.11",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*",
              "matchCriteriaId": "36D96259-24BD-44E2-96D9-78CE1D41F956",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
              "matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in the Linux kernel through 5.10.11. PI futexes have a kernel stack use-after-free during fault handling, allowing local users to execute code in the kernel, aka CID-34b1a1ce1458."
    },
    {
      "lang": "es",
      "value": "Se detect\u00f3 un problema en el kernel de Linux versiones hasta 5.10.11.\u0026#xa0;Los futexes de PI presentan un uso de la memoria previamente liberada de la pila del kernel durante el manejo de fallos, permitiendo a usuarios locales ejecutar c\u00f3digo en el kernel, tambi\u00e9n se conoce como CID-34b1a1ce1458"
    }
  ],
  "id": "CVE-2021-3347",
  "lastModified": "2026-06-17T04:04:58.743",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "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,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-3347",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-07-24T03:55:32.320311Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2021-01-29T17:15:12.950",
  "references": [
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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://lists.debian.org/debian-lts-announce/2021/02/msg00018.html"
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    {
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CVE-2021-3347 (GCVE-0-2021-3347)

Vulnerability from cvelistv5 – Published: 2021-01-29 16:56 – Updated: 2026-02-25 17:10

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-07-24 03:55 UTC

CWE

n/a
CWE-416 - Use After Free

Assigner

mitre mitre root

References

19 references

URL	Tags
https://git.kernel.org/pub/scm/linux/kernel/git/t…	x_refsource_MISC
https://git.kernel.org/pub/scm/linux/kernel/git/t…	x_refsource_MISC
https://git.kernel.org/pub/scm/linux/kernel/git/t…	x_refsource_MISC
https://git.kernel.org/pub/scm/linux/kernel/git/t…	x_refsource_MISC
https://git.kernel.org/pub/scm/linux/kernel/git/t…	x_refsource_MISC
https://git.kernel.org/pub/scm/linux/kernel/git/t…	x_refsource_MISC
https://git.kernel.org/pub/scm/linux/kernel/git/t…	x_refsource_MISC
https://git.kernel.org/pub/scm/linux/kernel/git/t…	x_refsource_MISC
https://www.openwall.com/lists/oss-security/2021/…	x_refsource_MISC
https://www.openwall.com/lists/oss-security/2021/…	x_refsource_MISC
http://www.openwall.com/lists/oss-security/2021/01/29/5	mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/01/29/4	mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/02/01/4	mailing-listx_refsource_MLIST
https://www.debian.org/security/2021/dsa-4843	vendor-advisoryx_refsource_DEBIAN
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST
https://security.netapp.com/advisory/ntap-2021030…	x_refsource_CONFIRM
https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST

Show details on NVD website

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              "name": "https://www.openwall.com/lists/oss-security/2021/01/29/1",
              "refsource": "MISC",
              "url": "https://www.openwall.com/lists/oss-security/2021/01/29/1"
            },
            {
              "name": "[oss-security] 20210129 Re: Linux Kernel: local priv escalation via futexes",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2021/01/29/5"
            },
            {
              "name": "[oss-security] 20210129 Re: Linux Kernel: local priv escalation via futexes",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2021/01/29/4"
            },
            {
              "name": "[oss-security] 20210201 Re: Linux Kernel: local priv escalation via futexes",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2021/02/01/4"
            },
            {
              "name": "DSA-4843",
              "refsource": "DEBIAN",
              "url": "https://www.debian.org/security/2021/dsa-4843"
            },
            {
              "name": "FEDORA-2021-6e805a5051",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CXAVDAK4RLAHBHHGEPL73UFXSI6BXQ7Q/"
            },
            {
              "name": "FEDORA-2021-879c756377",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QOBMXDJABYE76RKNBAWA2E4TSSBX7CSJ/"
            },
            {
              "name": "[debian-lts-announce] 20210212 [SECURITY] [DLA 2557-1] linux-4.19 security update",
              "refsource": "MLIST",
              "url": "https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20210304-0005/",
              "refsource": "CONFIRM",
              "url": "https://security.netapp.com/advisory/ntap-20210304-0005/"
            },
            {
              "name": "[debian-lts-announce] 20210309 [SECURITY] [DLA 2586-1] linux security update",
              "refsource": "MLIST",
              "url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-3347",
    "datePublished": "2021-01-29T16:56:16.000Z",
    "dateReserved": "2021-01-29T00:00:00.000Z",
    "dateUpdated": "2026-02-25T17:10:40.298Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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.

Action not permitted

FKIE_CVE-2021-3347

CVE-2021-3347 (GCVE-0-2021-3347)

Tags

Sightings

Nomenclature

Related by attack behaviour