CVE-2021-38300 (GCVE-0-2021-38300)

Vulnerability from cvelistv5 – Published: 2021-09-20 05:25 – Updated: 2024-08-04 01:37
VLAI
Summary
arch/mips/net/bpf_jit.c in the Linux kernel before 5.4.10 can generate undesirable machine code when transforming unprivileged cBPF programs, allowing execution of arbitrary code within the kernel context. This occurs because conditional branches can exceed the 128 KB limit of the MIPS architecture.
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": "2026-06-28T07:48:14+00:00",
      "cve": "CVE-2021-38300",
      "id": "CVE-2021-38300",
      "initial_release_date": "2021-09-14T00:00:00+00:00",
      "product_status:known_not_affected": "188",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: crafting anomalous machine code may lead to arbitrary Kernel code execution",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-38300.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.