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CVE-2025-38131

Estado: AnalizadaAlta (7.8)—

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)

Leer descripción completaMostrar menos

// 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.

Detalles técnicos trazas, registros y código del informe original
                                              deactivate config // sysfs
                                              (sys_activec_cnt == 0)
                                              cscfg_unload_config_sets()
                                              unload module

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

CWE-416 (use-after-free) con acceso local (AV:L) y sin requerir interacción (UI:N), típico de escalada de privilegios. El UAF permite ejecución de código arbitrario en contexto del kernel.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Execution PreventionThreat Intelligence ProgramRestrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationBehavior Prevention on Endpoint

Tecnologías afectadas (2)

Debian — Debian LinuxLinux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2025-38131",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
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    {
      "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' 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->cscfg_csdev_lock)\n// here load config activate by CPU1\nunlock(csdev->cscfg_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's 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 desactivación de la configuración activa al habilitarla. Al habilitar la configuración activa mediante cscfg_csdev_enable_active_config(), esta podría desactivarse mediante la interfaz sysfs de configfs. Esto podría generar un problema de UAF en el siguiente escenario: CPU0 CPU1 (habilitación sysfs) carga el módulo cscfg_load_config_sets() activa la configuración. // sysfs (sys_active_cnt == 1) ... cscfg_csdev_enable_active_config() lock(csdev->cscfg_csdev_lock) // aquí carga la configuración activada por CPU1 unlock(csdev->cscfg_csdev_lock) desactiva la configuración // sysfs (sys_activec_cnt == 0) cscfg_unload_config_sets() descarga el módulo // acceso a config_desc que se liberó // mientras se descargaba el módulo. cscfg_csdev_enable_config Para solucionar esto, utilice active_cnt de cscfg_config_desc como un recuento de referencia que se mantendrá cuando: - active la configuración. - habilite la configuración activada y coloque la referencia del módulo cuando config_active_cnt == 0."
    }
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  "lastModified": "2026-06-17T09:16:07.113",
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