fkie_cve-2021-47583
Vulnerability from fkie_nvd
Published
2024-06-19 15:15
Modified
2024-11-21 06:36
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: media: mxl111sf: change mutex_init() location Syzbot reported, that mxl111sf_ctrl_msg() uses uninitialized mutex. The problem was in wrong mutex_init() location. Previous mutex_init(&state->msg_lock) call was in ->init() function, but dvb_usbv2_init() has this order of calls: dvb_usbv2_init() dvb_usbv2_adapter_init() dvb_usbv2_adapter_frontend_init() props->frontend_attach() props->init() Since mxl111sf_* devices call mxl111sf_ctrl_msg() in ->frontend_attach() internally we need to initialize state->msg_lock before frontend_attach(). To achieve it, ->probe() call added to all mxl111sf_* devices, which will simply initiaize mutex.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/44870a9e7a3c24acbb3f888b2a7cc22c9bdf7e7fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4b2d9600b31f9ba7adbc9f3c54a068615d27b390Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8c6fdf62bfe1bc72bfceeaf832ef7499c7ed09baPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/96f182c9f48b984447741f054ec301fdc8517035Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b99bdf127af91d53919e96292c05f737c45ea59aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/44870a9e7a3c24acbb3f888b2a7cc22c9bdf7e7fPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/4b2d9600b31f9ba7adbc9f3c54a068615d27b390Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8c6fdf62bfe1bc72bfceeaf832ef7499c7ed09baPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/96f182c9f48b984447741f054ec301fdc8517035Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b99bdf127af91d53919e96292c05f737c45ea59aPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

{
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: mxl111sf: change mutex_init() location\n\nSyzbot reported, that mxl111sf_ctrl_msg() uses uninitialized\nmutex. The problem was in wrong mutex_init() location.\n\nPrevious mutex_init(\u0026state-\u003emsg_lock) call was in -\u003einit() function, but\ndvb_usbv2_init() has this order of calls:\n\n\tdvb_usbv2_init()\n\t  dvb_usbv2_adapter_init()\n\t    dvb_usbv2_adapter_frontend_init()\n\t      props-\u003efrontend_attach()\n\n\t  props-\u003einit()\n\nSince mxl111sf_* devices call mxl111sf_ctrl_msg() in -\u003efrontend_attach()\ninternally we need to initialize state-\u003emsg_lock before\nfrontend_attach(). To achieve it, -\u003eprobe() call added to all mxl111sf_*\ndevices, which will simply initiaize mutex."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: medio: mxl111sf: cambiar la ubicaci\u00f3n de mutex_init() Syzbot inform\u00f3 que mxl111sf_ctrl_msg() usa un mutex no inicializado. El problema estaba en la ubicaci\u00f3n mutex_init() incorrecta. La llamada anterior a mutex_init(\u0026amp;state-\u0026gt;msg_lock) estaba en la funci\u00f3n -\u0026gt;init(), pero dvb_usbv2_init() tiene este orden de llamadas: dvb_usbv2_init() dvb_usbv2_adapter_init() dvb_usbv2_adapter_frontend_init() props-\u0026gt;frontend_attach() props-\u0026gt;init() Desde Los dispositivos mxl111sf_* llaman a mxl111sf_ctrl_msg() en -\u0026gt;frontend_attach() internamente, necesitamos inicializar state-\u0026gt;msg_lock antes de frontend_attach(). Para lograrlo, se agrega la llamada -\u0026gt;probe() a todos los dispositivos mxl111sf_*, lo que simplemente iniciar\u00e1 el mutex."
    }
  ],
  "id": "CVE-2021-47583",
  "lastModified": "2024-11-21T06:36:35.997",
  "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"
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        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2024-06-19T15:15:52.843",
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-908"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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