CVE-2026-46308

Estado: AnalizadaAlta (7.8)—

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

pmdomain: mediatek: fix use-after-free in scpsys_get_bus_protection_legacy()

In scpsys_get_bus_protection_legacy(), of_find_node_with_property() returns a device node with its reference count incremented. The function then calls of_node_put(node) before checking whether syscon_regmap_lookup_by_phandle() returns an error. If an error occurs, dev_err_probe() dereferences the node pointer to print diagnostic information, but the node memory may have already been freed due to the earlier of_node_put(), leading to a use-after-free vulnerability.

Leer descripción completaMostrar menos

Fix this by moving the of_node_put() call after the error check, ensuring the node is still valid when accessed in the error path.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 7.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.17%
Percentil entre todas las CVEs puntuadas: 6
Fecha de la puntuación: 6/10/2026

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.

ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation85 %
Impacto principalT1059 Command and Scripting Interpreterexecution70 %

Vulnerabilidad de use-after-free (CWE-416) en kernel Linux con acceso local (AV:L, PR:L), explotable sin interacción (UI:N) para escalada de privilegios. Ejecución de código como impacto probable en contexto de pmdomain.

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 Prevention Threat Intelligence Program Restrict Web-Based Content Privileged Account Management Limit Software Installation Behavior Prevention on Endpoint

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-416

Referencias

JSON original (NVD)

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npmdomain: mediatek: fix use-after-free in scpsys_get_bus_protection_legacy()\n\nIn scpsys_get_bus_protection_legacy(), of_find_node_with_property()\nreturns a device node with its reference count incremented. The function\nthen calls of_node_put(node) before checking whether\nsyscon_regmap_lookup_by_phandle() returns an error. If an error occurs,\ndev_err_probe() dereferences the node pointer to print diagnostic\ninformation, but the node memory may have already been freed due to the\nearlier of_node_put(), leading to a use-after-free vulnerability.\n\nFix this by moving the of_node_put() call after the error check, ensuring\nthe node is still valid when accessed in the error path."
    },
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      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\npmdomain: mediatek: soluciona el uso después de liberación en scpsys_get_bus_protection_legacy()\n\nEn scpsys_get_bus_protection_legacy(), of_find_node_with_property() devuelve un nodo de dispositivo con su contador de referencias incrementado. La función luego llama a of_node_put(node) antes de verificar si syscon_regmap_lookup_by_phandle() devuelve un error. Si ocurre un error, dev_err_probe() desreferencia el puntero del nodo para imprimir información de diagnóstico, pero la memoria del nodo puede haber sido liberada ya debido a la llamada anterior a of_node_put(), lo que lleva a una vulnerabilidad de uso después de liberación.\n\nEsto se soluciona moviendo la llamada a of_node_put() después de la verificación de errores, asegurando que el nodo siga siendo válido cuando se accede a él en la ruta de error."
    }
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  "lastModified": "2026-07-23T08:10:00.137",
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