CVE-2021-47582 (GCVE-0-2021-47582)

Vulnerability from cvelistv5 – Published: 2024-06-19 14:53 – Updated: 2026-05-11 13:57
VLAI?
Title
USB: core: Make do_proc_control() and do_proc_bulk() killable
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 403716741c6c2c510dce44e88f085a740f535de6 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ae8709b296d80c7f45aa1f35c0e7659ad69edce1 (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.15.11 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)
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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.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"5.15.11\",\"matchCriteriaId\":\"B271E1AF-BC45-4C3E-9614-055846520592\"}]}]}],\"references\":[{\"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\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"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\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/403716741c6c2c510dce44e88f085a740f535de6\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/ae8709b296d80c7f45aa1f35c0e7659ad69edce1\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:39:59.853Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47582\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T17:12:46.485815Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:26.518Z\"}}], \"cna\": {\"title\": \"USB: core: Make do_proc_control() and do_proc_bulk() killable\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"403716741c6c2c510dce44e88f085a740f535de6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"ae8709b296d80c7f45aa1f35c0e7659ad69edce1\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/usb/core/devio.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"5.15.11\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"5.16\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/usb/core/devio.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/403716741c6c2c510dce44e88f085a740f535de6\"}, {\"url\": \"https://git.kernel.org/stable/c/ae8709b296d80c7f45aa1f35c0e7659ad69edce1\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.16\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-12-10T07:12:36.215Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47582\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-12-10T07:12:36.215Z\", \"dateReserved\": \"2024-05-24T15:11:00.730Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-06-19T14:53:48.788Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • 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.



Detection rules are retrieved from Rulezet.