CVE-2021-3669 (GCVE-0-2021-3669)

Vulnerability from cvelistv5 – Published: 2022-08-26 15:25 – Updated: 2025-11-03 21:44
VLAI
Summary
A flaw was found in the Linux kernel. Measuring usage of the shared memory does not scale with large shared memory segment counts which could lead to resource exhaustion and DoS.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-400 - - Uncontrolled Resource Consumption
Assigner
References
Impacted products
Vendor Product Version
n/a kernel Affected: Not Known
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T07:47:54+00:00",
      "cve": "CVE-2021-3669",
      "id": "CVE-2021-3669",
      "initial_release_date": "2021-08-02T06:02:00+00:00",
      "product_status:fixed": "150",
      "product_status:known_affected": "43",
      "product_status:known_not_affected": "106",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: reading /proc/sysvipc/shm does not scale with large shared memory segment counts",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-3669.json",
      "version": "3"
    }
  }
}



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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.