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CVE-2025-21979

Estado: AnalizadaAlta (7.8)—

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

wifi: cfg80211: cancel wiphy_work before freeing wiphy

A wiphy_work can be queued from the moment the wiphy is allocated and initialized (i.e. wiphy_new_nm). When a wiphy_work is queued, the rdev::wiphy_work is getting queued.

If wiphy_free is called before the rdev::wiphy_work had a chance to run, the wiphy memory will be freed, and then when it eventally gets to run it'll use invalid memory.

Fix this by canceling the work before freeing the wiphy.

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.

AV:L + PR:L + ejecución de código por use-after-free en kernel wifi (CWE-416). La pista sugiere T1068 para escalada local y T1059 como ejecución resultante.

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)

Mostrar
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: cancel wiphy_work before freeing wiphy\n\nA wiphy_work can be queued from the moment the wiphy is allocated and\ninitialized (i.e. wiphy_new_nm). When a wiphy_work is queued, the\nrdev::wiphy_work is getting queued.\n\nIf wiphy_free is called before the rdev::wiphy_work had a chance to run,\nthe wiphy memory will be freed, and then when it eventally gets to run\nit'll use invalid memory.\n\nFix this by canceling the work before freeing the wiphy."
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      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: cfg80211: cancelar wiphy_work antes de liberar wiphy. Un wiphy_work puede ponerse en cola desde el momento en que se asigna e inicializa el wiphy (es decir, wiphy_new_nm). Cuando se pone en cola un wiphy_work, también se pone en cola rdev::wiphy_work. Si se llama a wiphy_free antes de que rdev::wiphy_work se ejecute, se liberará la memoria del wiphy y, cuando finalmente se ejecute, usará memoria no válida. Para solucionar esto, cancele el trabajo antes de liberar el wiphy."
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