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CVE-2022-49954

Estado: AnalizadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

Input: iforce - wake up after clearing IFORCE_XMIT_RUNNING flag

syzbot is reporting hung task at __input_unregister_device() [1], for iforce_close() waiting at wait_event_interruptible() with dev->mutex held is blocking input_disconnect_device() from __input_unregister_device().

It seems that the cause is simply that commit c2b27ef672992a20 ("Input: iforce - wait for command completion when closing the device") forgot to call wake_up() after clear_bit().

Fix this problem by introducing a helper that calls clear_bit() followed by wake_up_all().

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2022-49954",
  "cveTags": [],
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        "source": "nvd@nist.gov",
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          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
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  "published": "2025-06-18T11:15:22.500",
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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: iforce - wake up after clearing IFORCE_XMIT_RUNNING flag\n\nsyzbot is reporting hung task at __input_unregister_device() [1], for\niforce_close() waiting at wait_event_interruptible() with dev->mutex held\nis blocking input_disconnect_device() from __input_unregister_device().\n\nIt seems that the cause is simply that commit c2b27ef672992a20 (\"Input:\niforce - wait for command completion when closing the device\") forgot to\ncall wake_up() after clear_bit().\n\nFix this problem by introducing a helper that calls clear_bit() followed\nby wake_up_all()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: Entrada: iforce - reactivar tras borrar el indicador IFORCE_XMIT_RUNNING. syzbot informa que la tarea está bloqueada en __input_unregister_device() [1], ya que iforce_close() espera en wait_event_interruptible() con dev->mutex retenido, lo que bloquea input_disconnect_device() desde __input_unregister_device(). Parece que la causa es simplemente que el commit c2b27ef672992a20 (\"Entrada: iforce - esperar a que se complete el comando al cerrar el dispositivo\") olvidó llamar a wake_up() después de clear_bit(). Se soluciona este problema mediante un asistente que llame a clear_bit() seguido de wake_up_all()."
    }
  ],
  "lastModified": "2026-06-17T05:19:36.850",
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