CVE-2021-43057 (GCVE-0-2021-43057)

Vulnerability from cvelistv5 – Published: 2021-10-28 03:36 – Updated: 2024-08-04 03:47
VLAI
Summary
An issue was discovered in the Linux kernel before 5.14.8. A use-after-free in selinux_ptrace_traceme (aka the SELinux handler for PTRACE_TRACEME) could be used by local attackers to cause memory corruption and escalate privileges, aka CID-a3727a8bac0a. This occurs because of an attempt to access the subjective credentials of another task.
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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    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-06-28T06:20:36+00:00",
      "cve": "CVE-2021-43057",
      "id": "CVE-2021-43057",
      "initial_release_date": "2021-09-23T00:00:00+00:00",
      "product_status:known_not_affected": "197",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: use-after-free in the SELinux handler for PTRACE_TRACEME",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-43057.json",
      "version": "3"
    }
  }
}



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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.