CVE-2021-47403 (GCVE-0-2021-47403)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:03 – Updated: 2026-05-11 13:54
VLAI
Title
ipack: ipoctal: fix module reference leak
Summary
In the Linux kernel, the following vulnerability has been resolved: ipack: ipoctal: fix module reference leak A reference to the carrier module was taken on every open but was only released once when the final reference to the tty struct was dropped. Fix this by taking the module reference and initialising the tty driver data when installing the tty.
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)
CWE
  • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 82a82340bab6c251e0705339f60763718eaa2a22 , < 31398849b84ebae0d43a1cf379cb9895597f221a (git)
Affected: 82a82340bab6c251e0705339f60763718eaa2a22 , < c0adb5a947dec6cff7050ec56d78ecd3916f9ce6 (git)
Affected: 82a82340bab6c251e0705339f60763718eaa2a22 , < dde4c1429b97383689f755ce92b4ed1e84a9c92b (git)
Affected: 82a82340bab6c251e0705339f60763718eaa2a22 , < 9c5b77a7ffc983b2429ce158b50497c5d3c86a69 (git)
Affected: 82a82340bab6c251e0705339f60763718eaa2a22 , < 3253c87e1e5bc0107aab773af2f135ebccf38666 (git)
Affected: 82a82340bab6c251e0705339f60763718eaa2a22 , < 7cea848678470daadbfdaa6a112b823c290f900c (git)
Affected: 82a82340bab6c251e0705339f60763718eaa2a22 , < 811178f296b16af30264def74c8d2179a72d5562 (git)
Affected: 82a82340bab6c251e0705339f60763718eaa2a22 , < bb8a4fcb2136508224c596a7e665bdba1d7c3c27 (git)
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Linux Linux Affected: 3.18
Unaffected: 0 , < 3.18 (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)
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linux linux_kernel Affected: 82a82340bab6
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Affected: 3.18
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 0
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 4.4.286
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 4.9.285
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 4.14.249
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 4.19.209
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 5.4.151
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 5.10.71
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 5.14.10
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 5.15
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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true, \"versionEndExcluding\": \"5.4.151\", \"versionStartIncluding\": \"3.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.71\", \"versionStartIncluding\": \"3.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.14.10\", \"versionStartIncluding\": \"3.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15\", \"versionStartIncluding\": \"3.18\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T07:10:14.660Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47403\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T07:10:14.660Z\", \"dateReserved\": \"2024-05-21T14:58:30.816Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T15:03:57.344Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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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.