CVE-2025-38416

Estado: ModificadaAlta (7.8)—

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

NFC: nci: uart: Set tty->disc_data only in success path

Setting tty->disc_data before opening the NCI device means we need to clean it up on error paths. This also opens some short window if device starts sending data, even before NCIUARTSETDRIVER IOCTL succeeded (broken hardware?). Close the window by exposing tty->disc_data only on the success path, when opening of the NCI device and try_module_get() succeeds.

The code differs in error path in one aspect: tty->disc_data won't be ever assigned thus NULL-ified. This however should not be relevant difference, because of "tty->disc_data=NULL" in nci_uart_tty_open().

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: 0.21%
Percentil entre todas las CVEs puntuadas: 10
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 Interpreterexecution75 %
Impacto secundarioT1499 Endpoint Denial of Serviceimpact60 %
Impacto secundarioT1565 Data Manipulationimpact65 %

Vulnerabilidad local (AV:L, PR:L) en kernel Linux que permite escalada sin interacción del usuario (UI:N). Acceso a privilegios elevados (C:H, I:H, A:H) mediante carrera en NFC/UART. Potencial ejecución de código kernel y denegación de servicio.

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 Restrict File and Directory Permissions Privileged Account Management Remote Data Storage

Tecnologías afectadas (2)

Debian — Debian Linux Linux — Linux Kernel

CWE

NVD-CWE-noinfo

Referencias

JSON original (NVD)

Mostrar

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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFC: nci: uart: Set tty->disc_data only in success path\n\nSetting tty->disc_data before opening the NCI device means we need to\nclean it up on error paths.  This also opens some short window if device\nstarts sending data, even before NCIUARTSETDRIVER IOCTL succeeded\n(broken hardware?).  Close the window by exposing tty->disc_data only on\nthe success path, when opening of the NCI device and try_module_get()\nsucceeds.\n\nThe code differs in error path in one aspect: tty->disc_data won't be\never assigned thus NULL-ified.  This however should not be relevant\ndifference, because of \"tty->disc_data=NULL\" in nci_uart_tty_open()."
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      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: NFC: nci: uart: Establecer tty-&gt;disc_data solo en la ruta correcta. Configurar tty-&gt;disc_data antes de abrir el dispositivo NCI implica la necesidad de eliminar las rutas de error. Esto también genera una pequeña ventana de tiempo si el dispositivo comienza a enviar datos, incluso antes de que NCIUARTSETDRIVER IOCTL se haya ejecutado correctamente (¿hardware dañado?). Esta ventana se cierra exponiendo tty-&gt;disc_data solo en la ruta correcta cuando se abre el dispositivo NCI y try_module_get() se ejecuta correctamente. El código difiere en la ruta de error en un aspecto: tty-&gt;disc_data nunca se asignará, por lo que se convierte en NULL. Sin embargo, esta diferencia no debería ser relevante, debido a \"tty-&gt;disc_data=NULL\" en nci_uart_tty_open()."
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