CVE-2026-23063

Estado: AnalizadaMedia (5.5)—

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

uacce: ensure safe queue release with state management

Directly calling `put_queue` carries risks since it cannot guarantee that resources of `uacce_queue` have been fully released beforehand. So adding a `stop_queue` operation for the UACCE_CMD_PUT_Q command and leaving the `put_queue` operation to the final resource release ensures safety.

Queue states are defined as follows: - UACCE_Q_ZOMBIE: Initial state - UACCE_Q_INIT: After opening `uacce` - UACCE_Q_STARTED: After `start` is issued via `ioctl`

When executing `poweroff -f` in virt while accelerator are still working, `uacce_fops_release` and `uacce_remove` may execute concurrently.

Leer descripción completaMostrar menos

This can cause `uacce_put_queue` within `uacce_fops_release` to access a NULL `ops` pointer. Therefore, add state checks to prevent accessing freed pointers.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 5.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.14%
Percentil entre todas las CVEs puntuadas: 3
Fecha de la puntuación: 5/10/2026

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).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-476

Referencias

JSON original (NVD)

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nuacce: ensure safe queue release with state management\n\nDirectly calling `put_queue` carries risks since it cannot\nguarantee that resources of `uacce_queue` have been fully released\nbeforehand. So adding a `stop_queue` operation for the\nUACCE_CMD_PUT_Q command and leaving the `put_queue` operation to\nthe final resource release ensures safety.\n\nQueue states are defined as follows:\n- UACCE_Q_ZOMBIE: Initial state\n- UACCE_Q_INIT: After opening `uacce`\n- UACCE_Q_STARTED: After `start` is issued via `ioctl`\n\nWhen executing `poweroff -f` in virt while accelerator are still\nworking, `uacce_fops_release` and `uacce_remove` may execute\nconcurrently. This can cause `uacce_put_queue` within\n`uacce_fops_release` to access a NULL `ops` pointer. Therefore, add\nstate checks to prevent accessing freed pointers."
    },
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      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nuacce: asegurar la liberación segura de la cola con gestión de estado\n\nLlamar directamente a 'put_queue' conlleva riesgos ya que no puede garantizar que los recursos de 'uacce_queue' hayan sido completamente liberados de antemano. Por lo tanto, añadir una operación 'stop_queue' para el comando UACCE_CMD_PUT_Q y dejar la operación 'put_queue' para la liberación final de recursos garantiza la seguridad.\n\nLos estados de la cola se definen de la siguiente manera:\n- UACCE_Q_ZOMBIE: Estado inicial\n- UACCE_Q_INIT: Después de abrir 'uacce'\n- UACCE_Q_STARTED: Después de que se emite 'start' a través de 'ioctl'\n\nAl ejecutar 'poweroff -f' en virt mientras el acelerador sigue funcionando, 'uacce_fops_release' y 'uacce_remove' pueden ejecutarse concurrentemente. Esto puede causar que 'uacce_put_queue' dentro de 'uacce_fops_release' acceda a un puntero 'ops' NULL. Por lo tanto, añadir comprobaciones de estado para evitar acceder a punteros liberados."
    }
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