CVE-2021-42327 (GCVE-0-2021-42327)

Vulnerability from cvelistv5 – Published: 2021-10-21 00:00 – Updated: 2024-08-04 03:30
VLAI
Summary
dp_link_settings_write in drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c in the Linux kernel through 5.14.14 allows a heap-based buffer overflow by an attacker who can write a string to the AMD GPU display drivers debug filesystem. There are no checks on size within parse_write_buffer_into_params when it uses the size of copy_from_user to copy a userspace buffer into a 40-byte heap buffer.
Severity
6.7 (Medium)
CVSS:3.1/AV:L/AC:L/PR:H/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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            "value": "dp_link_settings_write in drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c in the Linux kernel through 5.14.14 allows a heap-based buffer overflow by an attacker who can write a string to the AMD GPU display drivers debug filesystem. There are no checks on size within parse_write_buffer_into_params when it uses the size of copy_from_user to copy a userspace buffer into a 40-byte heap buffer."
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            "value": "la funci\u00f3n dp_link_settings_write en el archivo drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c en el kernel de Linux versiones hasta 5.14.14, permite un desbordamiento de b\u00fafer en la regi\u00f3n heap de la memoria por parte de un atacante que puede escribir una cadena en el sistema de archivos de depuraci\u00f3n de los controladores de la GPU AMD. No se presentan comprobaciones de tama\u00f1o dentro de parse_write_buffer_into_params cuando usa el tama\u00f1o de copy_from_user para copiar un buffer de espacio de usuario en un buffer de pila de 40 bytes"
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        "id": "CVE-2021-42327",
        "lastModified": "2026-06-17T04:09:39.263",
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              "baseSeverity": "MEDIUM",
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                "accessVector": "LOCAL",
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                "baseScore": 4.6,
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              "obtainAllPrivilege": false,
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              "obtainUserPrivilege": false,
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      "cve": "CVE-2021-42327",
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      "product_status:known_not_affected": "197",
      "source": "Red Hat CSAF VEX",
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      "title": "kernel: heap-based buffer overflow in dp_link_settings_write() in drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-42327.json",
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      "current_release_date": "2026-08-26T02:26:05Z",
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      "product_status:recommended": "457",
      "source": "SUSE CSAF VEX",
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      "title": "SUSE CVE CVE-2021-42327",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-42327.json",
      "version": "47"
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  }
}



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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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.