FKIE_CVE-2026-23063

Vulnerability from fkie_nvd - Published: 2026-02-04 17:16 - Updated: 2026-03-13 21:28
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
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. 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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/26c08dabe5475d99a13f353d8dd70e518de45663Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/336fb41a186e7c0415ae94fec9e23d1f04b87483Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/43f233eb6e7b9d88536881a9bc43726d0e34800dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/47634d70073890c9c37e39ab4ff93d4b585b028aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8b57bf1d3b1db692f34bce694a03e41be79f6016Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/92e4f11e29b98ef424ff72d6371acac03e5d973cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b457abeb5d962db88aaf60e249402fd3073dbfabPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
To clipboard 

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      "lang": "en",
      "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 liberaci\u00f3n segura de la cola con gesti\u00f3n de estado\n\nLlamar directamente a \u0027put_queue\u0027 conlleva riesgos ya que no puede garantizar que los recursos de \u0027uacce_queue\u0027 hayan sido completamente liberados de antemano. Por lo tanto, a\u00f1adir una operaci\u00f3n \u0027stop_queue\u0027 para el comando UACCE_CMD_PUT_Q y dejar la operaci\u00f3n \u0027put_queue\u0027 para la liberaci\u00f3n 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: Despu\u00e9s de abrir \u0027uacce\u0027\n- UACCE_Q_STARTED: Despu\u00e9s de que se emite \u0027start\u0027 a trav\u00e9s de \u0027ioctl\u0027\n\nAl ejecutar \u0027poweroff -f\u0027 en virt mientras el acelerador sigue funcionando, \u0027uacce_fops_release\u0027 y \u0027uacce_remove\u0027 pueden ejecutarse concurrentemente. Esto puede causar que \u0027uacce_put_queue\u0027 dentro de \u0027uacce_fops_release\u0027 acceda a un puntero \u0027ops\u0027 NULL. Por lo tanto, a\u00f1adir comprobaciones de estado para evitar acceder a punteros liberados."
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  "id": "CVE-2026-23063",
  "lastModified": "2026-03-13T21:28:17.910",
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          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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        "source": "nvd@nist.gov",
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  "published": "2026-02-04T17:16:16.987",
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