CVE-2021-41864 (GCVE-0-2021-41864)

Vulnerability from cvelistv5 – Published: 2021-10-01 23:46 – Updated: 2024-08-04 03:22
VLAI
Summary
prealloc_elems_and_freelist in kernel/bpf/stackmap.c in the Linux kernel before 5.14.12 allows unprivileged users to trigger an eBPF multiplication integer overflow with a resultant out-of-bounds write.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • n/a
Assigner
References
Show details on NVD website
To clipboard 

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      "sourceIdentifier": "cve@mitre.org",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-190\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-41864\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2021-10-02T00:15:07.503\",\"lastModified\":\"2026-06-17T04:09:01.717\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"prealloc_elems_and_freelist in kernel/bpf/stackmap.c in the Linux kernel before 5.14.12 allows unprivileged users to trigger an eBPF multiplication integer overflow with a resultant out-of-bounds write.\"},{\"lang\":\"es\",\"value\":\"prealloc_elems_and_freelist en kernel/bpf/stackmap.c en el kernel de Linux antes de la versi\u00f3n 5.14.12 permite a usuarios sin privilegios desencadenar un desbordamiento de enteros en la multiplicaci\u00f3n de eBPF con una escritura fuera de los l\u00edmites 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T06:26:14+00:00",
      "cve": "CVE-2021-41864",
      "id": "CVE-2021-41864",
      "initial_release_date": "2021-09-30T00:00:00+00:00",
      "product_status:fixed": "150",
      "product_status:known_affected": "28",
      "product_status:known_not_affected": "121",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: eBPF multiplication integer overflow in prealloc_elems_and_freelist() in kernel/bpf/stackmap.c leads to out-of-bounds write",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-41864.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-05-27T05:27:28Z",
      "cve": "CVE-2021-41864",
      "id": "CVE-2021-41864",
      "initial_release_date": "2023-02-15T03:37:23Z",
      "product_status:known_affected": "359",
      "product_status:known_not_affected": "141",
      "product_status:recommended": "1579",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-41864",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-41864.json",
      "version": "37"
    }
  }
}



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Tags
Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.