FKIE_CVE-2021-47194

Vulnerability from fkie_nvd - Published: 2024-04-10 19:15 - Updated: 2026-06-17 04:16
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0738cdb636c21ab552eaecf905efa4a6070e3ebcPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4e458abbb4a523f1413bfe15c079cf4e24c15b21Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/52affc201fc22a1ab9a59ef0ed641a9adfcb8d13Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/563fbefed46ae4c1f70cffb8eb54c02df480b2c2Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5a9b671c8d74a3e1b999e7a0c7f366079bcc93ddPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7b97b5776daa0b39dbdadfea176f9cc0646d4a66Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8f06bb8c216bcd172394f61e557727e691b4cb24Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b8a045e2a9b234cfbc06cf36923886164358ddecPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0738cdb636c21ab552eaecf905efa4a6070e3ebcPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/4e458abbb4a523f1413bfe15c079cf4e24c15b21Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/52affc201fc22a1ab9a59ef0ed641a9adfcb8d13Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/563fbefed46ae4c1f70cffb8eb54c02df480b2c2Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/5a9b671c8d74a3e1b999e7a0c7f366079bcc93ddPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/7b97b5776daa0b39dbdadfea176f9cc0646d4a66Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8f06bb8c216bcd172394f61e557727e691b4cb24Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b8a045e2a9b234cfbc06cf36923886164358ddecPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
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          "product": "Linux",
          "programFiles": [
            "net/wireless/util.c"
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          "vendor": "Linux",
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
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  "configurations": [
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      "nodes": [
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          "negate": false,
          "operator": "OR"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncfg80211: call cfg80211_stop_ap when switch from P2P_GO type\n\nIf the userspace tools switch from NL80211_IFTYPE_P2P_GO to\nNL80211_IFTYPE_ADHOC via send_msg(NL80211_CMD_SET_INTERFACE), it\ndoes not call the cleanup cfg80211_stop_ap(), this leads to the\ninitialization of in-use data. For example, this path re-init the\nsdata-\u003eassigned_chanctx_list while it is still an element of\nassigned_vifs list, and makes that linked list corrupt."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: cfg80211: llame a cfg80211_stop_ap cuando cambie del tipo P2P_GO. Si las herramientas del espacio de usuario cambian de NL80211_IFTYPE_P2P_GO a NL80211_IFTYPE_ADHOC mediante send_msg(NL80211_CMD_SET_INTERFACE), no llama a la limpieza cfg80211_ stop_ap(), esto lleva a la inicializaci\u00f3n de datos en uso. Por ejemplo, esta ruta reinicia sdata-\u0026gt;assigned_chanctx_list mientras todav\u00eda es un elemento de la lista asignada_vifs y corrompe esa lista vinculada."
    }
  ],
  "id": "CVE-2021-47194",
  "lastModified": "2026-06-17T04:16:52.917",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-47194",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-06-21T16:05:05.968362Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-04-10T19:15:47.807",
  "references": [
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  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-665"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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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

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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.