FKIE_CVE-2021-47582

Vulnerability from fkie_nvd - Published: 2024-06-19 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: USB: core: Make do_proc_control() and do_proc_bulk() killable The USBDEVFS_CONTROL and USBDEVFS_BULK ioctls invoke usb_start_wait_urb(), which contains an uninterruptible wait with a user-specified timeout value. If timeout value is very large and the device being accessed does not respond in a reasonable amount of time, the kernel will complain about "Task X blocked for more than N seconds", as found in testing by syzbot: INFO: task syz-executor.0:8700 blocked for more than 143 seconds. Not tainted 5.14.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:23192 pid: 8700 ppid: 8455 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4681 [inline] __schedule+0xc07/0x11f0 kernel/sched/core.c:5938 schedule+0x14b/0x210 kernel/sched/core.c:6017 schedule_timeout+0x98/0x2f0 kernel/time/timer.c:1857 do_wait_for_common+0x2da/0x480 kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion_timeout+0x46/0x60 kernel/sched/completion.c:157 usb_start_wait_urb+0x167/0x550 drivers/usb/core/message.c:63 do_proc_bulk+0x978/0x1080 drivers/usb/core/devio.c:1236 proc_bulk drivers/usb/core/devio.c:1273 [inline] usbdev_do_ioctl drivers/usb/core/devio.c:2547 [inline] usbdev_ioctl+0x3441/0x6b10 drivers/usb/core/devio.c:2713 ... To fix this problem, this patch replaces usbfs's calls to usb_control_msg() and usb_bulk_msg() with special-purpose code that does essentially the same thing (as recommended in the comment for usb_start_wait_urb()), except that it always uses a killable wait and it uses GFP_KERNEL rather than GFP_NOIO.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/403716741c6c2c510dce44e88f085a740f535de6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ae8709b296d80c7f45aa1f35c0e7659ad69edce1Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/403716741c6c2c510dce44e88f085a740f535de6Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ae8709b296d80c7f45aa1f35c0e7659ad69edce1Patch
Impacted products
Vendor Product Version
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/core/devio.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "403716741c6c2c510dce44e88f085a740f535de6",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "ae8709b296d80c7f45aa1f35c0e7659ad69edce1",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/core/devio.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.12"
            },
            {
              "lessThan": "2.6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B271E1AF-BC45-4C3E-9614-055846520592",
              "versionEndExcluding": "5.15.11",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: core: Make do_proc_control() and do_proc_bulk() killable\n\nThe USBDEVFS_CONTROL and USBDEVFS_BULK ioctls invoke\nusb_start_wait_urb(), which contains an uninterruptible wait with a\nuser-specified timeout value.  If timeout value is very large and the\ndevice being accessed does not respond in a reasonable amount of time,\nthe kernel will complain about \"Task X blocked for more than N\nseconds\", as found in testing by syzbot:\n\nINFO: task syz-executor.0:8700 blocked for more than 143 seconds.\n      Not tainted 5.14.0-rc7-syzkaller #0\n\"echo 0 \u003e /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\ntask:syz-executor.0  state:D stack:23192 pid: 8700 ppid:  8455 flags:0x00004004\nCall Trace:\n context_switch kernel/sched/core.c:4681 [inline]\n __schedule+0xc07/0x11f0 kernel/sched/core.c:5938\n schedule+0x14b/0x210 kernel/sched/core.c:6017\n schedule_timeout+0x98/0x2f0 kernel/time/timer.c:1857\n do_wait_for_common+0x2da/0x480 kernel/sched/completion.c:85\n __wait_for_common kernel/sched/completion.c:106 [inline]\n wait_for_common kernel/sched/completion.c:117 [inline]\n wait_for_completion_timeout+0x46/0x60 kernel/sched/completion.c:157\n usb_start_wait_urb+0x167/0x550 drivers/usb/core/message.c:63\n do_proc_bulk+0x978/0x1080 drivers/usb/core/devio.c:1236\n proc_bulk drivers/usb/core/devio.c:1273 [inline]\n usbdev_do_ioctl drivers/usb/core/devio.c:2547 [inline]\n usbdev_ioctl+0x3441/0x6b10 drivers/usb/core/devio.c:2713\n...\n\nTo fix this problem, this patch replaces usbfs\u0027s calls to\nusb_control_msg() and usb_bulk_msg() with special-purpose code that\ndoes essentially the same thing (as recommended in the comment for\nusb_start_wait_urb()), except that it always uses a killable wait and\nit uses GFP_KERNEL rather than GFP_NOIO."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: USB: core: Hacer que do_proc_control() y do_proc_bulk() se puedan eliminar. Los ioctls USBDEVFS_CONTROL y USBDEVFS_BULK invocan usb_start_wait_urb(), que contiene una espera ininterrumpida con un valor de tiempo de espera especificado por el usuario. Si el valor del tiempo de espera es muy grande y el dispositivo al que se accede no responde en un per\u00edodo de tiempo razonable, el kernel se quejar\u00e1 de \"Tarea X bloqueada durante m\u00e1s de N segundos\", como se encontr\u00f3 en las pruebas realizadas por syzbot: INFORMACI\u00d3N: tarea syz-executor .0:8700 bloqueado durante m\u00e1s de 143 segundos. Not tainted 5.14.0-rc7-syzkaller #0 \"echo 0 \u0026gt; /proc/sys/kernel/hung_task_timeout_secs\" desactiva este mensaje. tarea:syz-executor.0 estado:D pila:23192 pid: 8700 ppid: 8455 banderas:0x00004004 Seguimiento de llamadas: context_switch kernel/sched/core.c:4681 [en l\u00ednea] __schedule+0xc07/0x11f0 kernel/sched/core.c :5938 programaci\u00f3n+0x14b/0x210 kernel/sched/core.c:6017 Schedule_timeout+0x98/0x2f0 kernel/time/timer.c:1857 do_wait_for_common+0x2da/0x480 kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion .c:106 [en l\u00ednea] wait_for_common kernel/sched/completion.c:117 [en l\u00ednea] wait_for_completion_timeout+0x46/0x60 kernel/sched/completion.c:157 usb_start_wait_urb+0x167/0x550 drivers/usb/core/message.c:63 do_proc_bulk+0x978/0x1080 controladores/usb/core/devio.c:1236 controladores proc_bulk/usb/core/devio.c:1273 [en l\u00ednea] usbdev_do_ioctl controladores/usb/core/devio.c:2547 [en l\u00ednea] usbdev_ioctl+0x3441/ 0x6b10 drivers/usb/core/devio.c:2713 ... Para solucionar este problema, este parche reemplaza las llamadas de usbfs a usb_control_msg() y usb_bulk_msg() con c\u00f3digo de prop\u00f3sito especial que hace esencialmente lo mismo (como se recomienda en el comentario para usb_start_wait_urb()), excepto que siempre usa una espera eliminable y usa GFP_KERNEL en lugar de GFP_NOIO."
    }
  ],
  "id": "CVE-2021-47582",
  "lastModified": "2026-06-17T04:17:48.627",
  "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-2021-47582",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-09-10T17:12:46.485815Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-06-19T15:15:52.743",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/403716741c6c2c510dce44e88f085a740f535de6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/ae8709b296d80c7f45aa1f35c0e7659ad69edce1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/403716741c6c2c510dce44e88f085a740f535de6"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/ae8709b296d80c7f45aa1f35c0e7659ad69edce1"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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