CVE-2021-47401 (GCVE-0-2021-47401)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:03 – Updated: 2026-08-05 08:47
VLAI
Title
ipack: ipoctal: fix stack information leak
Summary
In the Linux kernel, the following vulnerability has been resolved: ipack: ipoctal: fix stack information leak The tty driver name is used also after registering the driver and must specifically not be allocated on the stack to avoid leaking information to user space (or triggering an oops). Drivers should not try to encode topology information in the tty device name but this one snuck in through staging without anyone noticing and another driver has since copied this malpractice. Fixing the ABI is a separate issue, but this at least plugs the security hole.
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: ba4dc61fe8c545a5d6a68b63616776556b771f51 , < acb96e782bad427ca4bb1bd94af660acd1462380 (git)
Affected: ba4dc61fe8c545a5d6a68b63616776556b771f51 , < 741ea2670e021350e54f491106bdaa22dc50e6a0 (git)
Affected: ba4dc61fe8c545a5d6a68b63616776556b771f51 , < 2725925982dc96a78069cd118ea3d66759bfdad7 (git)
Affected: ba4dc61fe8c545a5d6a68b63616776556b771f51 , < 829f13d6079cf7a2465522f39acb43033e9b320d (git)
Affected: ba4dc61fe8c545a5d6a68b63616776556b771f51 , < 8657158a3b68c85234e6da3d8eae33d6183588b7 (git)
Affected: ba4dc61fe8c545a5d6a68b63616776556b771f51 , < 5f6a309a699675680df15d9b6d389114515b4426 (git)
Affected: ba4dc61fe8c545a5d6a68b63616776556b771f51 , < 0a9c36a2e06a249acbed64e8e0b84637c2ad7575 (git)
Affected: ba4dc61fe8c545a5d6a68b63616776556b771f51 , < a89936cce87d60766a75732a9e7e25c51164f47c (git)
Create a notification for this product.
Linux Linux Affected: 3.5
Unaffected: 0 , < 3.5 (semver)
Unaffected: 4.4.286 , ≤ 4.4.* (semver)
Unaffected: 4.9.285 , ≤ 4.9.* (semver)
Unaffected: 4.14.249 , ≤ 4.14.* (semver)
Unaffected: 4.19.209 , ≤ 4.19.* (semver)
Unaffected: 5.4.151 , ≤ 5.4.* (semver)
Unaffected: 5.10.71 , ≤ 5.10.* (semver)
Unaffected: 5.14.10 , ≤ 5.14.* (semver)
Unaffected: 5.15 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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El nombre del controlador tty tambi\u00e9n se usa despu\u00e9s de registrar el controlador y espec\u00edficamente no debe asignarse en la pila para evitar filtrar informaci\u00f3n al espacio del usuario (o activar un ups). Los controladores no deber\u00edan intentar codificar informaci\u00f3n de topolog\u00eda en el nombre del dispositivo tty, pero este se col\u00f3 durante la preparaci\u00f3n sin que nadie se diera cuenta y desde entonces otro controlador copi\u00f3 esta mala pr\u00e1ctica. 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      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ipack: ipoctal: fix stack information leak",
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      "product_status:known_not_affected": "72",
      "product_status:recommended": "536",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-47401",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-47401.json",
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  }
}



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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.