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CVE-2025-38485

Estado: ModificadaAlta (7.8)—

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

iio: accel: fxls8962af: Fix use after free in fxls8962af_fifo_flush

fxls8962af_fifo_flush() uses indio_dev->active_scan_mask (with iio_for_each_active_channel()) without making sure the indio_dev stays in buffer mode. There is a race if indio_dev exits buffer mode in the middle of the interrupt that flushes the fifo. Fix this by calling synchronize_irq() to ensure that no interrupt is currently running when disabling buffer mode.

Detalles técnicos trazas, registros y código del informe original
Unable to handle kernel NULL pointer dereference at virtual address 00000000 when read
[...]
_find_first_bit_le from fxls8962af_fifo_flush+0x17c/0x290
fxls8962af_fifo_flush from fxls8962af_interrupt+0x80/0x178
fxls8962af_interrupt from irq_thread_fn+0x1c/0x7c
irq_thread_fn from irq_thread+0x110/0x1f4
irq_thread from kthread+0xe0/0xfc
kthread from ret_from_fork+0x14/0x2c

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.

CWE-416 (use after free) en controlador de kernel con AV:L/PR:L/UI:N permite escalada de privilegios locales o denegación de servicio por NULL pointer dereference. El NULL pointer crash sugiere DoS de kernel.

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

Threat Intelligence ProgramFilter Network TrafficExecution PreventionApplication Isolation and SandboxingExploit ProtectionUpdate Software

Tecnologías afectadas (2)

Debian — Debian LinuxLinux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: accel: fxls8962af: Fix use after free in fxls8962af_fifo_flush\n\nfxls8962af_fifo_flush() uses indio_dev->active_scan_mask (with\niio_for_each_active_channel()) without making sure the indio_dev\nstays in buffer mode.\nThere is a race if indio_dev exits buffer mode in the middle of the\ninterrupt that flushes the fifo. Fix this by calling\nsynchronize_irq() to ensure that no interrupt is currently running when\ndisabling buffer mode.\n\nUnable to handle kernel NULL pointer dereference at virtual address 00000000 when read\n[...]\n_find_first_bit_le from fxls8962af_fifo_flush+0x17c/0x290\nfxls8962af_fifo_flush from fxls8962af_interrupt+0x80/0x178\nfxls8962af_interrupt from irq_thread_fn+0x1c/0x7c\nirq_thread_fn from irq_thread+0x110/0x1f4\nirq_thread from kthread+0xe0/0xfc\nkthread from ret_from_fork+0x14/0x2c"
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      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iio: accel: fxls8962af: Se corrige el use-after-free en fxls8962af_fifo_flush. fxls8962af_fifo_flush() usa indio_dev->active_scan_mask (con iio_for_each_active_channel()) sin asegurarse de que indio_dev permanezca en modo búfer. Se produce una ejecución si indio_dev sale del modo búfer en medio de la interrupción que vacía el fifo. Se corrige esto llamando a synchronize_irq() para garantizar que no haya ninguna interrupción en ejecución al deshabilitar el modo búfer. No se puede manejar la desreferencia del puntero NULL del núcleo en la dirección virtual 00000000 al leer [...] _find_first_bit_le de fxls8962af_fifo_flush+0x17c/0x290 fxls8962af_fifo_flush de fxls8962af_interrupt+0x80/0x178 fxls8962af_interrupt de irq_thread_fn+0x1c/0x7c irq_thread_fn de irq_thread+0x110/0x1f4 irq_thread de kthread+0xe0/0xfc kthread de ret_from_fork+0x14/0x2c"
    }
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