CVE-2025-38416
Status: ModifiedHigh (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
- Version: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Base score: 7.8
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days: 0.21%
- Percentile among all scored CVEs: 10
- Score date: 10/5/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
🎯 ATT&CK techniques
How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.
- Exploitation
T1068Exploitation for Privilege Escalationprivilege escalation85 % - Primary impact
T1059Command and Scripting Interpreterexecution75 % - Secondary impact
T1499Endpoint Denial of Serviceimpact60 % - Secondary impact
T1565Data 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.
Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.
🛡️ ATT&CK mitigations that cover these techniques
Affected technologies (2)
CWEs
- NVD-CWE-noinfo
References
- https://git.kernel.org/stable/c/000bfbc6bc334a93fffca8f5aa9583e7b6356cb5
- https://git.kernel.org/stable/c/55c3dbd8389636161090a2b2b6d2d709b9602e9c
- https://git.kernel.org/stable/c/a514fca2b8e95838a3ba600f31a18fa60b76d893
- https://git.kernel.org/stable/c/a8acc7080ad55c5402a1b818b3008998247dda87
- https://git.kernel.org/stable/c/ac6992f72bd8e22679c1e147ac214de6a7093c23
- https://git.kernel.org/stable/c/dc7722619a9c307e9938d735cf4a2210d3d48dcb
- https://git.kernel.org/stable/c/e9799db771b2d574d5bf0dfb3177485e5f40d4d6
- https://git.kernel.org/stable/c/fc27ab48904ceb7e4792f0c400f1ef175edf16fe
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
Raw JSON (NVD)
Show
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"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->disc_data solo en la ruta correcta. Configurar tty->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->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->disc_data nunca se asignará, por lo que se convierte en NULL. Sin embargo, esta diferencia no debería ser relevante, debido a \"tty->disc_data=NULL\" en nci_uart_tty_open()."
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