fkie_cve-2025-38131
Vulnerability from fkie_nvd
Published
2025-07-03 09:15
Modified
2025-07-03 15:13
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: coresight: prevent deactivate active config while enabling the config While enable active config via cscfg_csdev_enable_active_config(), active config could be deactivated via configfs' sysfs interface. This could make UAF issue in below scenario: CPU0 CPU1 (sysfs enable) load module cscfg_load_config_sets() activate config. // sysfs (sys_active_cnt == 1) ... cscfg_csdev_enable_active_config() lock(csdev->cscfg_csdev_lock) // here load config activate by CPU1 unlock(csdev->cscfg_csdev_lock) deactivate config // sysfs (sys_activec_cnt == 0) cscfg_unload_config_sets() unload module // access to config_desc which freed // while unloading module. cscfg_csdev_enable_config To address this, use cscfg_config_desc's active_cnt as a reference count which will be holded when - activate the config. - enable the activated config. and put the module reference when config_active_cnt == 0.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/31028812724cef7bd57a51525ce58a32a6d73b22
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/408c97c4a5e0b634dcd15bf8b8808b382e888164
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b3b4efa2e623aecaebd7c9b9e4171f5c659e9724
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dfe8224c9c7a43d356eb9f74b06868aa05f90223
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ed42ee1ed05ff2f4c36938379057413a40c56680
Impacted products
Vendor Product Version


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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: prevent deactivate active config while enabling the config\n\nWhile enable active config via cscfg_csdev_enable_active_config(),\nactive config could be deactivated via configfs\u0027 sysfs interface.\nThis could make UAF issue in below scenario:\n\nCPU0                                          CPU1\n(sysfs enable)                                load module\n                                              cscfg_load_config_sets()\n                                              activate config. // sysfs\n                                              (sys_active_cnt == 1)\n...\ncscfg_csdev_enable_active_config()\nlock(csdev-\u003ecscfg_csdev_lock)\n// here load config activate by CPU1\nunlock(csdev-\u003ecscfg_csdev_lock)\n\n                                              deactivate config // sysfs\n                                              (sys_activec_cnt == 0)\n                                              cscfg_unload_config_sets()\n                                              unload module\n\n// access to config_desc which freed\n// while unloading module.\ncscfg_csdev_enable_config\n\nTo address this, use cscfg_config_desc\u0027s active_cnt as a reference count\n which will be holded when\n    - activate the config.\n    - enable the activated config.\nand put the module reference when config_active_cnt == 0."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: coresight: impide la desactivaci\u00f3n de la configuraci\u00f3n activa al habilitarla. Al habilitar la configuraci\u00f3n activa mediante cscfg_csdev_enable_active_config(), esta podr\u00eda desactivarse mediante la interfaz sysfs de configfs. Esto podr\u00eda generar un problema de UAF en el siguiente escenario: CPU0 CPU1 (habilitaci\u00f3n sysfs) carga el m\u00f3dulo cscfg_load_config_sets() activa la configuraci\u00f3n. // sysfs (sys_active_cnt == 1) ... cscfg_csdev_enable_active_config() lock(csdev-\u0026gt;cscfg_csdev_lock) // aqu\u00ed carga la configuraci\u00f3n activada por CPU1 unlock(csdev-\u0026gt;cscfg_csdev_lock) desactiva la configuraci\u00f3n // sysfs (sys_activec_cnt == 0) cscfg_unload_config_sets() descarga el m\u00f3dulo // acceso a config_desc que se liber\u00f3 // mientras se descargaba el m\u00f3dulo. cscfg_csdev_enable_config Para solucionar esto, utilice active_cnt de cscfg_config_desc como un recuento de referencia que se mantendr\u00e1 cuando: - active la configuraci\u00f3n. - habilite la configuraci\u00f3n activada y coloque la referencia del m\u00f3dulo cuando config_active_cnt == 0."
    }
  ],
  "id": "CVE-2025-38131",
  "lastModified": "2025-07-03T15:13:53.147",
  "metrics": {},
  "published": "2025-07-03T09:15:27.430",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/31028812724cef7bd57a51525ce58a32a6d73b22"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/408c97c4a5e0b634dcd15bf8b8808b382e888164"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b3b4efa2e623aecaebd7c9b9e4171f5c659e9724"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/dfe8224c9c7a43d356eb9f74b06868aa05f90223"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ed42ee1ed05ff2f4c36938379057413a40c56680"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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