CVE-2021-44733 (GCVE-0-2021-44733)

Vulnerability from cvelistv5 – Published: 2021-12-22 00:00 – Updated: 2024-08-04 04:32
VLAI
Summary
A use-after-free exists in drivers/tee/tee_shm.c in the TEE subsystem in the Linux kernel through 5.15.11. This occurs because of a race condition in tee_shm_get_from_id during an attempt to free a shared memory object.
Severity
7.0 (High)
CVSS:3.1/AV:L/AC:H/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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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T06:44:34+00:00",
      "cve": "CVE-2021-44733",
      "id": "CVE-2021-44733",
      "initial_release_date": "2021-12-14T12:00:00+00:00",
      "product_status:fixed": "150",
      "product_status:known_not_affected": "148",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: use-after-free in the TEE subsystem",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-44733.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-05-13T15:25:07Z",
      "cve": "CVE-2021-44733",
      "id": "CVE-2021-44733",
      "initial_release_date": "2023-02-15T03:36:31Z",
      "product_status:known_affected": "305",
      "product_status:known_not_affected": "125",
      "product_status:recommended": "1223",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-44733",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-44733.json",
      "version": "36"
    }
  }
}



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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.