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CVE-2021-33574 (GCVE-0-2021-33574)

Vulnerability from cvelistv5 – Published: 2021-05-25 00:00 – Updated: 2024-08-03 23:50
VLAI
Summary
The mq_notify function in the GNU C Library (aka glibc) versions 2.32 and 2.33 has a use-after-free. It may use the notification thread attributes object (passed through its struct sigevent parameter) after it has been freed by the caller, leading to a denial of service (application crash) or possibly unspecified other impact.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/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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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2025-11-21T11:36:05+00:00",
      "cve": "CVE-2021-33574",
      "id": "CVE-2021-33574",
      "initial_release_date": "2021-05-21T00:00:00+00:00",
      "product_status:fixed": "2598",
      "product_status:known_affected": "20",
      "product_status:known_not_affected": "216",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "glibc: mq_notify does not handle separately allocated thread attributes",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-33574.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T02:03:27Z",
      "cve": "CVE-2021-33574",
      "id": "CVE-2021-33574",
      "initial_release_date": "2023-02-15T03:40:23Z",
      "product_status:known_affected": "318",
      "product_status:recommended": "1456",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-33574",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-33574.json",
      "version": "61"
    }
  }
}



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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.