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CVE-2025-37845

Estado: ModificadaAlta (7.8)—

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

tracing: fprobe events: Fix possible UAF on modules

Commit ac91052f0ae5 ("tracing: tprobe-events: Fix leakage of module refcount") moved try_module_get() from __find_tracepoint_module_cb() to find_tracepoint() caller, but that introduced a possible UAF because the module can be unloaded before try_module_get(). In this case, the module object should be freed too. Thus, try_module_get() does not only fail but may access to the freed object.

To avoid that, try_module_get() in __find_tracepoint_module_cb() again.

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.

Vulnerabilidad de UAF (CWE-416) en kernel Linux que requiere acceso local (AV:L/PR:L) sin interacción. Permite ejecución de código arbitrario con escalada de privilegios tras liberar memoria de módulos.

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 (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: fprobe events: Fix possible UAF on modules\n\nCommit ac91052f0ae5 (\"tracing: tprobe-events: Fix leakage of module\nrefcount\") moved try_module_get() from __find_tracepoint_module_cb()\nto find_tracepoint() caller, but that introduced a possible UAF\nbecause the module can be unloaded before try_module_get(). In this\ncase, the module object should be freed too. Thus, try_module_get()\ndoes not only fail but may access to the freed object.\n\nTo avoid that, try_module_get() in __find_tracepoint_module_cb()\nagain."
    },
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      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tracing: fprobe events: Fix possible UAF on modules. La confirmación ac91052f0ae5 (\"tracing: tprobe-events: Fix leakage of module refcount\") trasladó try_module_get() de __find_tracepoint_module_cb() al llamador de find_tracepoint(), pero esto introdujo un posible UAF porque el módulo puede descargarse antes que try_module_get(). En este caso, el objeto del módulo también debería liberarse. Por lo tanto, try_module_get() no solo falla, sino que puede acceder al objeto liberado. Para evitarlo, vuelva a intentar try_module_get() en __find_tracepoint_module_cb()."
    }
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  "lastModified": "2026-07-30T06:22:23.390",
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