Vulnerability-Lookup

FKIE_CVE-2021-47349

Vulnerability from fkie_nvd - Published: 2024-05-21 15:15 - Updated: 2026-06-17 04:17

Severity

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: mwifiex: bring down link before deleting interface We can deadlock when rmmod'ing the driver or going through firmware reset, because the cfg80211_unregister_wdev() has to bring down the link for us, ... which then grab the same wiphy lock. nl80211_del_interface() already handles a very similar case, with a nice description: /* * We hold RTNL, so this is safe, without RTNL opencount cannot * reach 0, and thus the rdev cannot be deleted. * * We need to do it for the dev_close(), since that will call * the netdev notifiers, and we need to acquire the mutex there * but don't know if we get there from here or from some other * place (e.g. "ip link set ... down"). */ mutex_unlock(&rdev->wiphy.mtx); ... Do similarly for mwifiex teardown, by ensuring we bring the link down first. Sample deadlock trace: [ 247.103516] INFO: task rmmod:2119 blocked for more than 123 seconds. [ 247.110630] Not tainted 5.12.4 #5 [ 247.115796] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 247.124557] task:rmmod state:D stack: 0 pid: 2119 ppid: 2114 flags:0x00400208 [ 247.133905] Call trace: [ 247.136644] __switch_to+0x130/0x170 [ 247.140643] __schedule+0x714/0xa0c [ 247.144548] schedule_preempt_disabled+0x88/0xf4 [ 247.149714] __mutex_lock_common+0x43c/0x750 [ 247.154496] mutex_lock_nested+0x5c/0x68 [ 247.158884] cfg80211_netdev_notifier_call+0x280/0x4e0 [cfg80211] [ 247.165769] raw_notifier_call_chain+0x4c/0x78 [ 247.170742] call_netdevice_notifiers_info+0x68/0xa4 [ 247.176305] __dev_close_many+0x7c/0x138 [ 247.180693] dev_close_many+0x7c/0x10c [ 247.184893] unregister_netdevice_many+0xfc/0x654 [ 247.190158] unregister_netdevice_queue+0xb4/0xe0 [ 247.195424] _cfg80211_unregister_wdev+0xa4/0x204 [cfg80211] [ 247.201816] cfg80211_unregister_wdev+0x20/0x2c [cfg80211] [ 247.208016] mwifiex_del_virtual_intf+0xc8/0x188 [mwifiex] [ 247.214174] mwifiex_uninit_sw+0x158/0x1b0 [mwifiex] [ 247.219747] mwifiex_remove_card+0x38/0xa0 [mwifiex] [ 247.225316] mwifiex_pcie_remove+0xd0/0xe0 [mwifiex_pcie] [ 247.231451] pci_device_remove+0x50/0xe0 [ 247.235849] device_release_driver_internal+0x110/0x1b0 [ 247.241701] driver_detach+0x5c/0x9c [ 247.245704] bus_remove_driver+0x84/0xb8 [ 247.250095] driver_unregister+0x3c/0x60 [ 247.254486] pci_unregister_driver+0x2c/0x90 [ 247.259267] cleanup_module+0x18/0xcdc [mwifiex_pcie]

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1f9482aa8d412b4ba06ce6ab8e333fb8ca29a06e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/35af69c7c0490fdccfc159c6a87e4d1dc070838a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a3041d39d3c14da97fa3476835aba043ba810cf0	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/1f9482aa8d412b4ba06ce6ab8e333fb8ca29a06e	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/35af69c7c0490fdccfc159c6a87e4d1dc070838a	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/a3041d39d3c14da97fa3476835aba043ba810cf0	Patch

Impacted products

	Vendor	Product	Version
	linux	linux_kernel	*
	linux	linux_kernel	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/marvell/mwifiex/main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a3041d39d3c14da97fa3476835aba043ba810cf0",
              "status": "affected",
              "version": "a05829a7222e9d10c416dd2dbbf3929fe6646b89",
              "versionType": "git"
            },
            {
              "lessThan": "35af69c7c0490fdccfc159c6a87e4d1dc070838a",
              "status": "affected",
              "version": "a05829a7222e9d10c416dd2dbbf3929fe6646b89",
              "versionType": "git"
            },
            {
              "lessThan": "1f9482aa8d412b4ba06ce6ab8e333fb8ca29a06e",
              "status": "affected",
              "version": "a05829a7222e9d10c416dd2dbbf3929fe6646b89",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/marvell/mwifiex/main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.12"
            },
            {
              "lessThan": "5.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.12.*",
              "status": "unaffected",
              "version": "5.12.18",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.13.*",
              "status": "unaffected",
              "version": "5.13.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.14",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "5EB72DFA-B894-49EE-B7E0-64BEA02A6669",
              "versionEndExcluding": "5.12.18",
              "versionStartIncluding": "5.12",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "853187F6-707A-487B-95C0-621B5211B43C",
              "versionEndExcluding": "5.13.3",
              "versionStartIncluding": "5.13",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmwifiex: bring down link before deleting interface\n\nWe can deadlock when rmmod\u0027ing the driver or going through firmware\nreset, because the cfg80211_unregister_wdev() has to bring down the link\nfor us, ... which then grab the same wiphy lock.\n\nnl80211_del_interface() already handles a very similar case, with a nice\ndescription:\n\n        /*\n         * We hold RTNL, so this is safe, without RTNL opencount cannot\n         * reach 0, and thus the rdev cannot be deleted.\n         *\n         * We need to do it for the dev_close(), since that will call\n         * the netdev notifiers, and we need to acquire the mutex there\n         * but don\u0027t know if we get there from here or from some other\n         * place (e.g. \"ip link set ... down\").\n         */\n        mutex_unlock(\u0026rdev-\u003ewiphy.mtx);\n...\n\nDo similarly for mwifiex teardown, by ensuring we bring the link down\nfirst.\n\nSample deadlock trace:\n\n[  247.103516] INFO: task rmmod:2119 blocked for more than 123 seconds.\n[  247.110630]       Not tainted 5.12.4 #5\n[  247.115796] \"echo 0 \u003e /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\n[  247.124557] task:rmmod           state:D stack:    0 pid: 2119 ppid:  2114 flags:0x00400208\n[  247.133905] Call trace:\n[  247.136644]  __switch_to+0x130/0x170\n[  247.140643]  __schedule+0x714/0xa0c\n[  247.144548]  schedule_preempt_disabled+0x88/0xf4\n[  247.149714]  __mutex_lock_common+0x43c/0x750\n[  247.154496]  mutex_lock_nested+0x5c/0x68\n[  247.158884]  cfg80211_netdev_notifier_call+0x280/0x4e0 [cfg80211]\n[  247.165769]  raw_notifier_call_chain+0x4c/0x78\n[  247.170742]  call_netdevice_notifiers_info+0x68/0xa4\n[  247.176305]  __dev_close_many+0x7c/0x138\n[  247.180693]  dev_close_many+0x7c/0x10c\n[  247.184893]  unregister_netdevice_many+0xfc/0x654\n[  247.190158]  unregister_netdevice_queue+0xb4/0xe0\n[  247.195424]  _cfg80211_unregister_wdev+0xa4/0x204 [cfg80211]\n[  247.201816]  cfg80211_unregister_wdev+0x20/0x2c [cfg80211]\n[  247.208016]  mwifiex_del_virtual_intf+0xc8/0x188 [mwifiex]\n[  247.214174]  mwifiex_uninit_sw+0x158/0x1b0 [mwifiex]\n[  247.219747]  mwifiex_remove_card+0x38/0xa0 [mwifiex]\n[  247.225316]  mwifiex_pcie_remove+0xd0/0xe0 [mwifiex_pcie]\n[  247.231451]  pci_device_remove+0x50/0xe0\n[  247.235849]  device_release_driver_internal+0x110/0x1b0\n[  247.241701]  driver_detach+0x5c/0x9c\n[  247.245704]  bus_remove_driver+0x84/0xb8\n[  247.250095]  driver_unregister+0x3c/0x60\n[  247.254486]  pci_unregister_driver+0x2c/0x90\n[  247.259267]  cleanup_module+0x18/0xcdc [mwifiex_pcie]"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mwifiex: desactivar el enlace antes de eliminar la interfaz. Podemos bloquearnos al modificar el controlador o restablecer el firmware, porque cfg80211_unregister_wdev() tiene que desactivar el enlace por nosotros. .. que luego agarra el mismo candado wiphy. nl80211_del_interface() ya maneja un caso muy similar, con una buena descripci\u00f3n: /* * Mantenemos RTNL, por lo que esto es seguro, sin RTNL opencount no puede * llegar a 0 y, por lo tanto, rdev no se puede eliminar. * * Necesitamos hacerlo para dev_close(), ya que eso llamar\u00e1 * a los notificadores de netdev, y necesitamos adquirir el mutex all\u00ed * pero no sabemos si llegamos all\u00ed desde aqu\u00ed o desde alg\u00fan otro * lugar (por ejemplo \"enlace IP configurado... inactivo\"). */ mutex_unlock(\u0026amp;rdev-\u0026gt;wiphy.mtx); ... Haga lo mismo con el desmontaje de mwifiex, asegur\u00e1ndose de que primero desconectamos el enlace. Ejemplo de seguimiento de interbloqueo: [247.103516] INFORMACI\u00d3N: tarea rmmod:2119 bloqueada durante m\u00e1s de 123 segundos. [247.110630] No contaminado 5.12.4 #5 [247.115796] \"echo 0 \u0026gt; /proc/sys/kernel/hung_task_timeout_secs\" desactiva este mensaje. [247.124557] tarea:rmmod estado:D pila: 0 pid: 2119 ppid: 2114 banderas:0x00400208 [247.133905] Rastreo de llamadas: [247.136644] __switch_to+0x130/0x170 [ 247.140643] 14/0xa0c [247.144548] Schedule_preempt_disabled+0x88/ 0xf4 [ 247.149714] __mutex_lock_common+0x43c/0x750 [ 247.154496] mutex_lock_nested+0x5c/0x68 [ 247.158884] cfg80211_netdev_notifier_call+0x280/0x4e0 [cfg80211] [ 47.165769] raw_notifier_call_chain+0x4c/0x78 [ 247.170742] call_netdevice_notifiers_info+0x68/0xa4 [ 247.176305] __dev_close_many+0x7c /0x138 [ 247.180693] dev_close_many+0x7c/0x10c [ 247.184893] unregister_netdevice_many+0xfc/0x654 [ 247.190158] unregister_netdevice_queue+0xb4/0xe0 [ 247.195424] 11_unregister_wdev+0xa4/0x204 [cfg80211] [ 247.201816] cfg80211_unregister_wdev+0x20/0x2c [cfg80211] [ 247.208016 ] mwifiex_del_virtual_intf+0xc8/0x188 [mwifiex] [ 247.214174] mwifiex_uninit_sw+0x158/0x1b0 [mwifiex] [ 247.219747] mwifiex_remove_card+0x38/0xa0 [mwifiex] [ 247.225316 ] mwifiex_pcie_remove+0xd0/0xe0 [mwifiex_pcie] [ 247.231451] pci_device_remove+0x50/0xe0 [ 247.235849] device_release_driver_internal+0x110/0x1b0 [ 247.241701] driver_detach+0x5c/0x9c [ 247.245704] bus_remove_driver+0x84/0xb8 [ 247.250095] driver_unregister+0x3c/0x60 [ 2 47.254486] pci_unregister_driver+0x2c/0x90 [ 247.259267] cleanup_module+0x18/0xcdc [mwifiex_pcie ]"
    }
  ],
  "id": "CVE-2021-47349",
  "lastModified": "2026-06-17T04:17:15.750",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-47349",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-09-10T15:38:43.542695Z",
          "version": "2.0.3"
        }
      }
    ]
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  "published": "2024-05-21T15:15:21.417",
  "references": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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    },
    {
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      "tags": [
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      "url": "https://git.kernel.org/stable/c/1f9482aa8d412b4ba06ce6ab8e333fb8ca29a06e"
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      "url": "https://git.kernel.org/stable/c/a3041d39d3c14da97fa3476835aba043ba810cf0"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-667"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2021-47349 (GCVE-0-2021-47349)

Vulnerability from cvelistv5 – Published: 2024-05-21 14:35 – Updated: 2026-05-11 13:52

Title

mwifiex: bring down link before deleting interface

Summary

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 15:38 UTC

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6996 records in the last 180 days details

References

3 references

URL	Tags
https://git.kernel.org/stable/c/a3041d39d3c14da97…
https://git.kernel.org/stable/c/35af69c7c0490fdcc…
https://git.kernel.org/stable/c/1f9482aa8d412b4ba…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: a05829a7222e9d10c416dd2dbbf3929fe6646b89 , < a3041d39d3c14da97fa3476835aba043ba810cf0 (git) Affected: a05829a7222e9d10c416dd2dbbf3929fe6646b89 , < 35af69c7c0490fdccfc159c6a87e4d1dc070838a (git) Affected: a05829a7222e9d10c416dd2dbbf3929fe6646b89 , < 1f9482aa8d412b4ba06ce6ab8e333fb8ca29a06e (git)
Linux	Linux	Affected: 5.12 Unaffected: 0 , < 5.12 (semver) Unaffected: 5.12.18 , ≤ 5.12.* (semver) Unaffected: 5.13.3 , ≤ 5.13.* (semver) Unaffected: 5.14 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:32:08.509Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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            "url": "https://git.kernel.org/stable/c/a3041d39d3c14da97fa3476835aba043ba810cf0"
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            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/35af69c7c0490fdccfc159c6a87e4d1dc070838a"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/1f9482aa8d412b4ba06ce6ab8e333fb8ca29a06e"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-47349",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T15:38:43.542695Z",
                "version": "2.0.3"
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              "type": "ssvc"
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        "providerMetadata": {
          "dateUpdated": "2024-09-11T17:32:57.818Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/marvell/mwifiex/main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a3041d39d3c14da97fa3476835aba043ba810cf0",
              "status": "affected",
              "version": "a05829a7222e9d10c416dd2dbbf3929fe6646b89",
              "versionType": "git"
            },
            {
              "lessThan": "35af69c7c0490fdccfc159c6a87e4d1dc070838a",
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              "version": "a05829a7222e9d10c416dd2dbbf3929fe6646b89",
              "versionType": "git"
            },
            {
              "lessThan": "1f9482aa8d412b4ba06ce6ab8e333fb8ca29a06e",
              "status": "affected",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/marvell/mwifiex/main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "version": "5.12"
            },
            {
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              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "5.12.18",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.13.*",
              "status": "unaffected",
              "version": "5.13.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.14",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.12.18",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.13.3",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.14",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmwifiex: bring down link before deleting interface\n\nWe can deadlock when rmmod\u0027ing the driver or going through firmware\nreset, because the cfg80211_unregister_wdev() has to bring down the link\nfor us, ... which then grab the same wiphy lock.\n\nnl80211_del_interface() already handles a very similar case, with a nice\ndescription:\n\n        /*\n         * We hold RTNL, so this is safe, without RTNL opencount cannot\n         * reach 0, and thus the rdev cannot be deleted.\n         *\n         * We need to do it for the dev_close(), since that will call\n         * the netdev notifiers, and we need to acquire the mutex there\n         * but don\u0027t know if we get there from here or from some other\n         * place (e.g. \"ip link set ... down\").\n         */\n        mutex_unlock(\u0026rdev-\u003ewiphy.mtx);\n...\n\nDo similarly for mwifiex teardown, by ensuring we bring the link down\nfirst.\n\nSample deadlock trace:\n\n[  247.103516] INFO: task rmmod:2119 blocked for more than 123 seconds.\n[  247.110630]       Not tainted 5.12.4 #5\n[  247.115796] \"echo 0 \u003e /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\n[  247.124557] task:rmmod           state:D stack:    0 pid: 2119 ppid:  2114 flags:0x00400208\n[  247.133905] Call trace:\n[  247.136644]  __switch_to+0x130/0x170\n[  247.140643]  __schedule+0x714/0xa0c\n[  247.144548]  schedule_preempt_disabled+0x88/0xf4\n[  247.149714]  __mutex_lock_common+0x43c/0x750\n[  247.154496]  mutex_lock_nested+0x5c/0x68\n[  247.158884]  cfg80211_netdev_notifier_call+0x280/0x4e0 [cfg80211]\n[  247.165769]  raw_notifier_call_chain+0x4c/0x78\n[  247.170742]  call_netdevice_notifiers_info+0x68/0xa4\n[  247.176305]  __dev_close_many+0x7c/0x138\n[  247.180693]  dev_close_many+0x7c/0x10c\n[  247.184893]  unregister_netdevice_many+0xfc/0x654\n[  247.190158]  unregister_netdevice_queue+0xb4/0xe0\n[  247.195424]  _cfg80211_unregister_wdev+0xa4/0x204 [cfg80211]\n[  247.201816]  cfg80211_unregister_wdev+0x20/0x2c [cfg80211]\n[  247.208016]  mwifiex_del_virtual_intf+0xc8/0x188 [mwifiex]\n[  247.214174]  mwifiex_uninit_sw+0x158/0x1b0 [mwifiex]\n[  247.219747]  mwifiex_remove_card+0x38/0xa0 [mwifiex]\n[  247.225316]  mwifiex_pcie_remove+0xd0/0xe0 [mwifiex_pcie]\n[  247.231451]  pci_device_remove+0x50/0xe0\n[  247.235849]  device_release_driver_internal+0x110/0x1b0\n[  247.241701]  driver_detach+0x5c/0x9c\n[  247.245704]  bus_remove_driver+0x84/0xb8\n[  247.250095]  driver_unregister+0x3c/0x60\n[  247.254486]  pci_unregister_driver+0x2c/0x90\n[  247.259267]  cleanup_module+0x18/0xcdc [mwifiex_pcie]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T13:52:58.952Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a3041d39d3c14da97fa3476835aba043ba810cf0"
        },
        {
          "url": "https://git.kernel.org/stable/c/35af69c7c0490fdccfc159c6a87e4d1dc070838a"
        },
        {
          "url": "https://git.kernel.org/stable/c/1f9482aa8d412b4ba06ce6ab8e333fb8ca29a06e"
        }
      ],
      "title": "mwifiex: bring down link before deleting interface",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47349",
    "datePublished": "2024-05-21T14:35:54.314Z",
    "dateReserved": "2024-05-21T14:28:16.983Z",
    "dateUpdated": "2026-05-11T13:52:58.952Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

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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.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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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.

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