CVE-2021-47194 (GCVE-0-2021-47194)

Vulnerability from cvelistv5 – Published: 2024-04-10 18:56 – Updated: 2026-08-05 08:46
VLAI
Title
cfg80211: call cfg80211_stop_ap when switch from P2P_GO type
Summary
In the Linux kernel, the following vulnerability has been resolved: cfg80211: call cfg80211_stop_ap when switch from P2P_GO type If the userspace tools switch from NL80211_IFTYPE_P2P_GO to NL80211_IFTYPE_ADHOC via send_msg(NL80211_CMD_SET_INTERFACE), it does not call the cleanup cfg80211_stop_ap(), this leads to the initialization of in-use data. For example, this path re-init the sdata->assigned_chanctx_list while it is still an element of assigned_vifs list, and makes that linked list corrupt.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-06-21 16:05 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ac800140c20e7ae51117e71289065bedd4930fc2 , < 8f06bb8c216bcd172394f61e557727e691b4cb24 (git)
Affected: ac800140c20e7ae51117e71289065bedd4930fc2 , < 0738cdb636c21ab552eaecf905efa4a6070e3ebc (git)
Affected: ac800140c20e7ae51117e71289065bedd4930fc2 , < 4e458abbb4a523f1413bfe15c079cf4e24c15b21 (git)
Affected: ac800140c20e7ae51117e71289065bedd4930fc2 , < b8a045e2a9b234cfbc06cf36923886164358ddec (git)
Affected: ac800140c20e7ae51117e71289065bedd4930fc2 , < 52affc201fc22a1ab9a59ef0ed641a9adfcb8d13 (git)
Affected: ac800140c20e7ae51117e71289065bedd4930fc2 , < 7b97b5776daa0b39dbdadfea176f9cc0646d4a66 (git)
Affected: ac800140c20e7ae51117e71289065bedd4930fc2 , < 5a9b671c8d74a3e1b999e7a0c7f366079bcc93dd (git)
Affected: ac800140c20e7ae51117e71289065bedd4930fc2 , < 563fbefed46ae4c1f70cffb8eb54c02df480b2c2 (git)
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Linux Linux Affected: 3.6
Unaffected: 0 , < 3.6 (semver)
Unaffected: 4.4.293 , ≤ 4.4.* (semver)
Unaffected: 4.9.291 , ≤ 4.9.* (semver)
Unaffected: 4.14.256 , ≤ 4.14.* (semver)
Unaffected: 4.19.218 , ≤ 4.19.* (semver)
Unaffected: 5.4.162 , ≤ 5.4.* (semver)
Unaffected: 5.10.82 , ≤ 5.10.* (semver)
Unaffected: 5.15.5 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-05T03:52:10+00:00",
      "cve": "CVE-2021-47194",
      "id": "CVE-2021-47194",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:known_affected": "90",
      "product_status:known_not_affected": "108",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: cfg80211: call cfg80211_stop_ap when switch from P2P_GO type",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47194.json",
      "version": "3"
    },
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      "cveMetadata": "{\"cveId\": \"CVE-2021-47194\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T08:46:38.073Z\", \"dateReserved\": \"2024-03-25T09:12:14.114Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-04-10T18:56:31.361Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.


Detection rules are retrieved from Rulezet.