CVE-2021-47436 (GCVE-0-2021-47436)
Vulnerability from cvelistv5
Published
2024-05-22 06:19
Modified
2025-05-04 12:41
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: musb: dsps: Fix the probe error path Commit 7c75bde329d7 ("usb: musb: musb_dsps: request_irq() after initializing musb") has inverted the calls to dsps_setup_optional_vbus_irq() and dsps_create_musb_pdev() without updating correctly the error path. dsps_create_musb_pdev() allocates and registers a new platform device which must be unregistered and freed with platform_device_unregister(), and this is missing upon dsps_setup_optional_vbus_irq() error. While on the master branch it seems not to trigger any issue, I observed a kernel crash because of a NULL pointer dereference with a v5.10.70 stable kernel where the patch mentioned above was backported. With this kernel version, -EPROBE_DEFER is returned the first time dsps_setup_optional_vbus_irq() is called which triggers the probe to error out without unregistering the platform device. Unfortunately, on the Beagle Bone Black Wireless, the platform device still living in the system is being used by the USB Ethernet gadget driver, which during the boot phase triggers the crash. My limited knowledge of the musb world prevents me to revert this commit which was sent to silence a robot warning which, as far as I understand, does not make sense. The goal of this patch was to prevent an IRQ to fire before the platform device being registered. I think this cannot ever happen due to the fact that enabling the interrupts is done by the ->enable() callback of the platform musb device, and this platform device must be already registered in order for the core or any other user to use this callback. Hence, I decided to fix the error path, which might prevent future errors on mainline kernels while also fixing older ones.
References
Impacted products
Vendor Product Version
Linux Linux Version: 5269937d1483d3159d5b51907346e4f4b13ef079
Version: ffc825049ed2e8c849d318e987fd5073e0be462f
Version: 9a4a6805294fa7d2653e82972bdaf9e3e1f3d3c9
Version: 8de01a896c1bc14b6b65b8d26013626597a45eda
Version: 72bb3eafcfdd156713a3ea0c9c95d536bd6e6e55
Version: 7c75bde329d7e2a93cf86a5c15c61f96f1446cdc
Version: f5b4df24b4209cc3b9ccc768897415be18807e46
 Create a notification for this product.
   Linux Linux Version: 4.14.247   ≤
Version: 4.19.207   ≤
Version: 5.4.148   ≤
Version: 5.10.67   ≤
Version: 5.14.6   ≤
Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-47436",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-06-17T18:03:36.424310Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-06-17T18:04:23.811Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:39:58.936Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/5ed60a430fb5f3d93e7fef66264daef466b4d10c"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/e923bce31ffefe4f60edfc6b84f62d4a858f3676"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/9ab5d539bc975b8dcde86eca1b58d836b657732e"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/9d89e287116796bf987cc48f5c8632ef3048f8eb"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/ff9249aab39820be11b6975a10d94253b7d426fc"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/c2115b2b16421d93d4993f3fe4c520e91d6fe801"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/musb/musb_dsps.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5ed60a430fb5f3d93e7fef66264daef466b4d10c",
              "status": "affected",
              "version": "5269937d1483d3159d5b51907346e4f4b13ef079",
              "versionType": "git"
            },
            {
              "lessThan": "e923bce31ffefe4f60edfc6b84f62d4a858f3676",
              "status": "affected",
              "version": "ffc825049ed2e8c849d318e987fd5073e0be462f",
              "versionType": "git"
            },
            {
              "lessThan": "9ab5d539bc975b8dcde86eca1b58d836b657732e",
              "status": "affected",
              "version": "9a4a6805294fa7d2653e82972bdaf9e3e1f3d3c9",
              "versionType": "git"
            },
            {
              "lessThan": "9d89e287116796bf987cc48f5c8632ef3048f8eb",
              "status": "affected",
              "version": "8de01a896c1bc14b6b65b8d26013626597a45eda",
              "versionType": "git"
            },
            {
              "lessThan": "ff9249aab39820be11b6975a10d94253b7d426fc",
              "status": "affected",
              "version": "72bb3eafcfdd156713a3ea0c9c95d536bd6e6e55",
              "versionType": "git"
            },
            {
              "lessThan": "c2115b2b16421d93d4993f3fe4c520e91d6fe801",
              "status": "affected",
              "version": "7c75bde329d7e2a93cf86a5c15c61f96f1446cdc",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f5b4df24b4209cc3b9ccc768897415be18807e46",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/musb/musb_dsps.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4.14.252",
              "status": "affected",
              "version": "4.14.247",
              "versionType": "semver"
            },
            {
              "lessThan": "4.19.213",
              "status": "affected",
              "version": "4.19.207",
              "versionType": "semver"
            },
            {
              "lessThan": "5.4.155",
              "status": "affected",
              "version": "5.4.148",
              "versionType": "semver"
            },
            {
              "lessThan": "5.10.75",
              "status": "affected",
              "version": "5.10.67",
              "versionType": "semver"
            },
            {
              "lessThan": "5.14.14",
              "status": "affected",
              "version": "5.14.6",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.252",
                  "versionStartIncluding": "4.14.247",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.213",
                  "versionStartIncluding": "4.19.207",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.155",
                  "versionStartIncluding": "5.4.148",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.75",
                  "versionStartIncluding": "5.10.67",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.14.14",
                  "versionStartIncluding": "5.14.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.13.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: musb: dsps: Fix the probe error path\n\nCommit 7c75bde329d7 (\"usb: musb: musb_dsps: request_irq() after\ninitializing musb\") has inverted the calls to\ndsps_setup_optional_vbus_irq() and dsps_create_musb_pdev() without\nupdating correctly the error path. dsps_create_musb_pdev() allocates and\nregisters a new platform device which must be unregistered and freed\nwith platform_device_unregister(), and this is missing upon\ndsps_setup_optional_vbus_irq() error.\n\nWhile on the master branch it seems not to trigger any issue, I observed\na kernel crash because of a NULL pointer dereference with a v5.10.70\nstable kernel where the patch mentioned above was backported. With this\nkernel version, -EPROBE_DEFER is returned the first time\ndsps_setup_optional_vbus_irq() is called which triggers the probe to\nerror out without unregistering the platform device. Unfortunately, on\nthe Beagle Bone Black Wireless, the platform device still living in the\nsystem is being used by the USB Ethernet gadget driver, which during the\nboot phase triggers the crash.\n\nMy limited knowledge of the musb world prevents me to revert this commit\nwhich was sent to silence a robot warning which, as far as I understand,\ndoes not make sense. The goal of this patch was to prevent an IRQ to\nfire before the platform device being registered. I think this cannot\never happen due to the fact that enabling the interrupts is done by the\n-\u003eenable() callback of the platform musb device, and this platform\ndevice must be already registered in order for the core or any other\nuser to use this callback.\n\nHence, I decided to fix the error path, which might prevent future\nerrors on mainline kernels while also fixing older ones."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T12:41:28.383Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5ed60a430fb5f3d93e7fef66264daef466b4d10c"
        },
        {
          "url": "https://git.kernel.org/stable/c/e923bce31ffefe4f60edfc6b84f62d4a858f3676"
        },
        {
          "url": "https://git.kernel.org/stable/c/9ab5d539bc975b8dcde86eca1b58d836b657732e"
        },
        {
          "url": "https://git.kernel.org/stable/c/9d89e287116796bf987cc48f5c8632ef3048f8eb"
        },
        {
          "url": "https://git.kernel.org/stable/c/ff9249aab39820be11b6975a10d94253b7d426fc"
        },
        {
          "url": "https://git.kernel.org/stable/c/c2115b2b16421d93d4993f3fe4c520e91d6fe801"
        }
      ],
      "title": "usb: musb: dsps: Fix the probe error path",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47436",
    "datePublished": "2024-05-22T06:19:32.220Z",
    "dateReserved": "2024-05-21T14:58:30.830Z",
    "dateUpdated": "2025-05-04T12:41:28.383Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/5ed60a430fb5f3d93e7fef66264daef466b4d10c\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/e923bce31ffefe4f60edfc6b84f62d4a858f3676\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/9ab5d539bc975b8dcde86eca1b58d836b657732e\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/9d89e287116796bf987cc48f5c8632ef3048f8eb\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/ff9249aab39820be11b6975a10d94253b7d426fc\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/c2115b2b16421d93d4993f3fe4c520e91d6fe801\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:39:58.936Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47436\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-06-17T18:03:36.424310Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-06-17T18:03:37.388Z\"}}], \"cna\": {\"title\": \"usb: musb: dsps: Fix the probe error path\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5269937d1483d3159d5b51907346e4f4b13ef079\", \"lessThan\": \"5ed60a430fb5f3d93e7fef66264daef466b4d10c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ffc825049ed2e8c849d318e987fd5073e0be462f\", \"lessThan\": \"e923bce31ffefe4f60edfc6b84f62d4a858f3676\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9a4a6805294fa7d2653e82972bdaf9e3e1f3d3c9\", \"lessThan\": \"9ab5d539bc975b8dcde86eca1b58d836b657732e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8de01a896c1bc14b6b65b8d26013626597a45eda\", \"lessThan\": \"9d89e287116796bf987cc48f5c8632ef3048f8eb\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"72bb3eafcfdd156713a3ea0c9c95d536bd6e6e55\", \"lessThan\": \"ff9249aab39820be11b6975a10d94253b7d426fc\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"7c75bde329d7e2a93cf86a5c15c61f96f1446cdc\", \"lessThan\": \"c2115b2b16421d93d4993f3fe4c520e91d6fe801\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"f5b4df24b4209cc3b9ccc768897415be18807e46\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/usb/musb/musb_dsps.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.14.247\", \"lessThan\": \"4.14.252\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"4.19.207\", \"lessThan\": \"4.19.213\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.4.148\", \"lessThan\": \"5.4.155\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.10.67\", \"lessThan\": \"5.10.75\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.14.6\", \"lessThan\": \"5.14.14\", \"versionType\": \"semver\"}], \"programFiles\": [\"drivers/usb/musb/musb_dsps.c\"], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/5ed60a430fb5f3d93e7fef66264daef466b4d10c\"}, {\"url\": \"https://git.kernel.org/stable/c/e923bce31ffefe4f60edfc6b84f62d4a858f3676\"}, {\"url\": \"https://git.kernel.org/stable/c/9ab5d539bc975b8dcde86eca1b58d836b657732e\"}, {\"url\": \"https://git.kernel.org/stable/c/9d89e287116796bf987cc48f5c8632ef3048f8eb\"}, {\"url\": \"https://git.kernel.org/stable/c/ff9249aab39820be11b6975a10d94253b7d426fc\"}, {\"url\": \"https://git.kernel.org/stable/c/c2115b2b16421d93d4993f3fe4c520e91d6fe801\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nusb: musb: dsps: Fix the probe error path\\n\\nCommit 7c75bde329d7 (\\\"usb: musb: musb_dsps: request_irq() after\\ninitializing musb\\\") has inverted the calls to\\ndsps_setup_optional_vbus_irq() and dsps_create_musb_pdev() without\\nupdating correctly the error path. dsps_create_musb_pdev() allocates and\\nregisters a new platform device which must be unregistered and freed\\nwith platform_device_unregister(), and this is missing upon\\ndsps_setup_optional_vbus_irq() error.\\n\\nWhile on the master branch it seems not to trigger any issue, I observed\\na kernel crash because of a NULL pointer dereference with a v5.10.70\\nstable kernel where the patch mentioned above was backported. With this\\nkernel version, -EPROBE_DEFER is returned the first time\\ndsps_setup_optional_vbus_irq() is called which triggers the probe to\\nerror out without unregistering the platform device. Unfortunately, on\\nthe Beagle Bone Black Wireless, the platform device still living in the\\nsystem is being used by the USB Ethernet gadget driver, which during the\\nboot phase triggers the crash.\\n\\nMy limited knowledge of the musb world prevents me to revert this commit\\nwhich was sent to silence a robot warning which, as far as I understand,\\ndoes not make sense. The goal of this patch was to prevent an IRQ to\\nfire before the platform device being registered. I think this cannot\\never happen due to the fact that enabling the interrupts is done by the\\n-\u003eenable() callback of the platform musb device, and this platform\\ndevice must be already registered in order for the core or any other\\nuser to use this callback.\\n\\nHence, I decided to fix the error path, which might prevent future\\nerrors on mainline kernels while also fixing older ones.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.252\", \"versionStartIncluding\": \"4.14.247\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.213\", \"versionStartIncluding\": \"4.19.207\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.155\", \"versionStartIncluding\": \"5.4.148\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.75\", \"versionStartIncluding\": \"5.10.67\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.14.14\", \"versionStartIncluding\": \"5.14.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.13.19\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T12:41:28.383Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47436\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T12:41:28.383Z\", \"dateReserved\": \"2024-05-21T14:58:30.830Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-22T06:19:32.220Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • 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.