CVE-2025-38131 (GCVE-0-2025-38131)
Vulnerability from cvelistv5
Published
2025-07-03 08:35
Modified
2025-07-28 04:13
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
Impacted products
Vendor Product Version
Linux Linux Version: f8cce2ff3c04361b8843d8489620fda8880f668b
Version: f8cce2ff3c04361b8843d8489620fda8880f668b
Version: f8cce2ff3c04361b8843d8489620fda8880f668b
Version: f8cce2ff3c04361b8843d8489620fda8880f668b
Version: f8cce2ff3c04361b8843d8489620fda8880f668b
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hwtracing/coresight/coresight-config.h",
            "drivers/hwtracing/coresight/coresight-syscfg.c"
          ],
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        },
        {
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          "product": "Linux",
          "programFiles": [
            "drivers/hwtracing/coresight/coresight-config.h",
            "drivers/hwtracing/coresight/coresight-syscfg.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "version": "5.15"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.1.142",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.6.94",
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              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.34",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "versionEndExcluding": "6.1.142",
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                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.94",
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                  "vulnerable": true
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                {
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              "negate": false,
              "operator": "OR"
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      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-28T04:13:00.836Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/dfe8224c9c7a43d356eb9f74b06868aa05f90223"
        },
        {
          "url": "https://git.kernel.org/stable/c/b3b4efa2e623aecaebd7c9b9e4171f5c659e9724"
        },
        {
          "url": "https://git.kernel.org/stable/c/31028812724cef7bd57a51525ce58a32a6d73b22"
        },
        {
          "url": "https://git.kernel.org/stable/c/ed42ee1ed05ff2f4c36938379057413a40c56680"
        },
        {
          "url": "https://git.kernel.org/stable/c/408c97c4a5e0b634dcd15bf8b8808b382e888164"
        }
      ],
      "title": "coresight: prevent deactivate active config while enabling the config",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38131",
    "datePublished": "2025-07-03T08:35:35.036Z",
    "dateReserved": "2025-04-16T04:51:23.987Z",
    "dateUpdated": "2025-07-28T04:13:00.836Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38131\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-07-03T09:15:27.430\",\"lastModified\":\"2025-07-03T15:13:53.147\",\"vulnStatus\":\"Awaiting Analysis\",\"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.\"}],\"metrics\":{},\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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