cve-2021-47494
Vulnerability from cvelistv5
Published
2024-05-22 08:19
Modified
2024-11-04 12:07
Severity ?
Summary
cfg80211: fix management registrations locking
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website


{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-47494",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-05-22T18:38:36.269063Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-06-04T17:15:18.041Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:39:59.605Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/4c22227e39c7a0b4dab55617ee8d34d171fab8d4"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/3c897f39b71fe68f90599f6a45b5f7bf5618420e"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/09b1d5dc6ce1c9151777f6c4e128a59457704c97"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/net/cfg80211.h",
            "net/wireless/core.c",
            "net/wireless/core.h",
            "net/wireless/mlme.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4c22227e39c7",
              "status": "affected",
              "version": "6cd536fe62ef",
              "versionType": "git"
            },
            {
              "lessThan": "3c897f39b71f",
              "status": "affected",
              "version": "6cd536fe62ef",
              "versionType": "git"
            },
            {
              "lessThan": "09b1d5dc6ce1",
              "status": "affected",
              "version": "6cd536fe62ef",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/net/cfg80211.h",
            "net/wireless/core.c",
            "net/wireless/core.h",
            "net/wireless/mlme.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.8"
            },
            {
              "lessThan": "5.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.77",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.14.*",
              "status": "unaffected",
              "version": "5.14.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncfg80211: fix management registrations locking\n\nThe management registrations locking was broken, the list was\nlocked for each wdev, but cfg80211_mgmt_registrations_update()\niterated it without holding all the correct spinlocks, causing\nlist corruption.\n\nRather than trying to fix it with fine-grained locking, just\nmove the lock to the wiphy/rdev (still need the list on each\nwdev), we already need to hold the wdev lock to change it, so\nthere\u0027s no contention on the lock in any case. This trivially\nfixes the bug since we hold one wdev\u0027s lock already, and now\nwill hold the lock that protects all lists."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-11-04T12:07:00.210Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4c22227e39c7a0b4dab55617ee8d34d171fab8d4"
        },
        {
          "url": "https://git.kernel.org/stable/c/3c897f39b71fe68f90599f6a45b5f7bf5618420e"
        },
        {
          "url": "https://git.kernel.org/stable/c/09b1d5dc6ce1c9151777f6c4e128a59457704c97"
        }
      ],
      "title": "cfg80211: fix management registrations locking",
      "x_generator": {
        "engine": "bippy-9e1c9544281a"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47494",
    "datePublished": "2024-05-22T08:19:42.083Z",
    "dateReserved": "2024-05-22T06:20:56.201Z",
    "dateUpdated": "2024-11-04T12:07:00.210Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47494\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-22T09:15:11.270\",\"lastModified\":\"2024-05-22T12:46:53.887\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncfg80211: fix management registrations locking\\n\\nThe management registrations locking was broken, the list was\\nlocked for each wdev, but cfg80211_mgmt_registrations_update()\\niterated it without holding all the correct spinlocks, causing\\nlist corruption.\\n\\nRather than trying to fix it with fine-grained locking, just\\nmove the lock to the wiphy/rdev (still need the list on each\\nwdev), we already need to hold the wdev lock to change it, so\\nthere\u0027s no contention on the lock in any case. This trivially\\nfixes the bug since we hold one wdev\u0027s lock already, and now\\nwill hold the lock that protects all lists.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: cfg80211: corrige el bloqueo de registros de administraci\u00f3n. El bloqueo de registros de administraci\u00f3n estaba roto, la lista estaba bloqueada para cada wdev, pero cfg80211_mgmt_registrations_update() la repiti\u00f3 sin mantener todos los spinlocks correctos, lo que provoc\u00f3 corrupci\u00f3n en la lista. En lugar de intentar solucionarlo con un bloqueo detallado, simplemente mueva el bloqueo a wiphy/rdev (a\u00fan necesitamos la lista en cada wdev), ya necesitamos mantener presionado el bloqueo wdev para cambiarlo, por lo que no hay contenci\u00f3n en el bloqueo. En todo caso. Esto soluciona trivialmente el error ya que ya tenemos un bloqueo de wdev y ahora mantendremos el bloqueo que protege todas las listas.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/09b1d5dc6ce1c9151777f6c4e128a59457704c97\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3c897f39b71fe68f90599f6a45b5f7bf5618420e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4c22227e39c7a0b4dab55617ee8d34d171fab8d4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading...

Loading...

Loading...

Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.