cve-2021-47479
Vulnerability from cvelistv5
Published
2024-05-22 08:19
Modified
2024-11-04 12:06
Severity ?
Summary
staging: rtl8712: fix use-after-free in rtl8712_dl_fw
Impacted products
Vendor Product Version
Linux Linux Version: 3.3
Show details on NVD website


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                "id": "CVE-2021-47479",
                "options": [
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                    "Exploitation": "none"
                  },
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                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-05-24T19:24:15.320557Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
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        "providerMetadata": {
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:39:59.455Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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            "url": "https://git.kernel.org/stable/c/c430094541a80575259a94ff879063ef01473506"
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            "url": "https://git.kernel.org/stable/c/befd23bd3b17f1a3f9c943a8580b47444c7c63ed"
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            "url": "https://git.kernel.org/stable/c/a65c9afe9f2f55b7a7fb4a25ab654cd4139683a4"
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            "url": "https://git.kernel.org/stable/c/c052cc1a069c3e575619cf64ec427eb41176ca70"
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        ],
        "title": "CVE Program Container"
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    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/staging/rtl8712/usb_intf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "3.3"
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              "lessThan": "3.3",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "version": "5.10.79",
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8712: fix use-after-free in rtl8712_dl_fw\n\nSyzbot reported use-after-free in rtl8712_dl_fw(). The problem was in\nrace condition between r871xu_dev_remove() -\u003endo_open() callback.\n\nIt\u0027s easy to see from crash log, that driver accesses released firmware\nin -\u003endo_open() callback. It may happen, since driver was releasing\nfirmware _before_ unregistering netdev. Fix it by moving\nunregister_netdev() before cleaning up resources.\n\nCall Trace:\n...\n rtl871x_open_fw drivers/staging/rtl8712/hal_init.c:83 [inline]\n rtl8712_dl_fw+0xd95/0xe10 drivers/staging/rtl8712/hal_init.c:170\n rtl8712_hal_init drivers/staging/rtl8712/hal_init.c:330 [inline]\n rtl871x_hal_init+0xae/0x180 drivers/staging/rtl8712/hal_init.c:394\n netdev_open+0xe6/0x6c0 drivers/staging/rtl8712/os_intfs.c:380\n __dev_open+0x2bc/0x4d0 net/core/dev.c:1484\n\nFreed by task 1306:\n...\n release_firmware+0x1b/0x30 drivers/base/firmware_loader/main.c:1053\n r871xu_dev_remove+0xcc/0x2c0 drivers/staging/rtl8712/usb_intf.c:599\n usb_unbind_interface+0x1d8/0x8d0 drivers/usb/core/driver.c:458"
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      "providerMetadata": {
        "dateUpdated": "2024-11-04T12:06:43.715Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c430094541a80575259a94ff879063ef01473506"
        },
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          "url": "https://git.kernel.org/stable/c/befd23bd3b17f1a3f9c943a8580b47444c7c63ed"
        },
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          "url": "https://git.kernel.org/stable/c/a65c9afe9f2f55b7a7fb4a25ab654cd4139683a4"
        },
        {
          "url": "https://git.kernel.org/stable/c/c052cc1a069c3e575619cf64ec427eb41176ca70"
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      ],
      "title": "staging: rtl8712: fix use-after-free in rtl8712_dl_fw",
      "x_generator": {
        "engine": "bippy-9e1c9544281a"
      }
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47479",
    "datePublished": "2024-05-22T08:19:32.174Z",
    "dateReserved": "2024-05-22T06:20:56.200Z",
    "dateUpdated": "2024-11-04T12:06:43.715Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47479\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-22T09:15:09.817\",\"lastModified\":\"2024-11-21T06:36:16.310\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nstaging: rtl8712: fix use-after-free in rtl8712_dl_fw\\n\\nSyzbot reported use-after-free in rtl8712_dl_fw(). The problem was in\\nrace condition between r871xu_dev_remove() -\u003endo_open() callback.\\n\\nIt\u0027s easy to see from crash log, that driver accesses released firmware\\nin -\u003endo_open() callback. It may happen, since driver was releasing\\nfirmware _before_ unregistering netdev. Fix it by moving\\nunregister_netdev() before cleaning up resources.\\n\\nCall Trace:\\n...\\n rtl871x_open_fw drivers/staging/rtl8712/hal_init.c:83 [inline]\\n rtl8712_dl_fw+0xd95/0xe10 drivers/staging/rtl8712/hal_init.c:170\\n rtl8712_hal_init drivers/staging/rtl8712/hal_init.c:330 [inline]\\n rtl871x_hal_init+0xae/0x180 drivers/staging/rtl8712/hal_init.c:394\\n netdev_open+0xe6/0x6c0 drivers/staging/rtl8712/os_intfs.c:380\\n __dev_open+0x2bc/0x4d0 net/core/dev.c:1484\\n\\nFreed by task 1306:\\n...\\n release_firmware+0x1b/0x30 drivers/base/firmware_loader/main.c:1053\\n r871xu_dev_remove+0xcc/0x2c0 drivers/staging/rtl8712/usb_intf.c:599\\n usb_unbind_interface+0x1d8/0x8d0 drivers/usb/core/driver.c:458\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: staging: rtl8712: corrige el use-after-free en rtl8712_dl_fw Syzbot inform\u00f3 el use-after-free en rtl8712_dl_fw(). El problema estaba en la condici\u00f3n de ejecuci\u00f3n entre la devoluci\u00f3n de llamada r871xu_dev_remove() -\u0026gt;ndo_open(). Es f\u00e1cil ver en el registro de fallos que el controlador accede al firmware lanzado en la devoluci\u00f3n de llamada -\u0026gt;ndo_open(). Puede suceder, ya que el controlador estaba lanzando el firmware _antes_ de cancelar el registro de netdev. Solucionarlo moviendo unregister_netdev() antes de limpiar los recursos. Traza de llamada: ... RTL871X_OPEN_FW : 330 [ inline] rtl871x_hal_init+0xae/0x180 drivers/staging/rtl8712/hal_init.c:394 netdev_open+0xe6/0x6c0 drivers/staging/rtl8712/os_intfs.c:380 __dev_open+0x2bc/0x4d0 net/core/dev.c:1484 Liberado por tarea 1306: ... release_firmware+0x1b/0x30 drivers/base/firmware_loader/main.c:1053 r871xu_dev_remove+0xcc/0x2c0 drivers/staging/rtl8712/usb_intf.c:599 usb_unbind_interface+0x1d8/0x8d0 drivers/usb/core/driver .c:458\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/a65c9afe9f2f55b7a7fb4a25ab654cd4139683a4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/befd23bd3b17f1a3f9c943a8580b47444c7c63ed\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c052cc1a069c3e575619cf64ec427eb41176ca70\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c430094541a80575259a94ff879063ef01473506\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a65c9afe9f2f55b7a7fb4a25ab654cd4139683a4\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/befd23bd3b17f1a3f9c943a8580b47444c7c63ed\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/c052cc1a069c3e575619cf64ec427eb41176ca70\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/c430094541a80575259a94ff879063ef01473506\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
  }
}


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