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CVE-2025-21849

Estado: ModificadaMedia (5.5)—

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

drm/i915/gt: Use spin_lock_irqsave() in interruptible context

spin_lock/unlock() functions used in interrupt contexts could result in a deadlock, as seen in GitLab issue #13399, which occurs when interrupt comes in while holding a lock.

Try to remedy the problem by saving irq state before spin lock acquisition.

v2: add irqs' state save/restore calls to all locks/unlocks in signal_irq_work() execution (Maciej)

v3: use with spin_lock_irqsave() in guc_lrc_desc_unpin() instead of other lock/unlock calls and add Fixes and Cc tags (Tvrtko); change title and commit message

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(cherry picked from commit c088387ddd6482b40f21ccf23db1125e8fa4af7e)

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).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2025-21849",
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          "version": "2.0.3",
          "timestamp": "2025-10-01T19:26:20.912921Z"
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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/i915/gt: Use spin_lock_irqsave() in interruptible context\n\nspin_lock/unlock() functions used in interrupt contexts could\nresult in a deadlock, as seen in GitLab issue #13399,\nwhich occurs when interrupt comes in while holding a lock.\n\nTry to remedy the problem by saving irq state before spin lock\nacquisition.\n\nv2: add irqs' state save/restore calls to all locks/unlocks in\n signal_irq_work() execution (Maciej)\n\nv3: use with spin_lock_irqsave() in guc_lrc_desc_unpin() instead\n of other lock/unlock calls and add Fixes and Cc tags (Tvrtko);\n change title and commit message\n\n(cherry picked from commit c088387ddd6482b40f21ccf23db1125e8fa4af7e)"
    },
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      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/i915/gt: El uso de spin_lock_irqsave() en un contexto interrumpible. Las funciones spin_lock/unlock() utilizadas en contextos de interrupción podrían provocar un interbloqueo, como se observó en el problema n.° 13399 de GitLab, que ocurre cuando la interrupción entra mientras se mantiene un bloqueo. Intente solucionar el problema guardando el estado de las irq antes de adquirir el bloqueo de giro. v2: añadir llamadas de guardado/restauración de estado de las irq a todos los bloqueos/desbloqueos en la ejecución de signal_irq_work() (Maciej). v3: usar con spin_lock_irqsave() en guc_lrc_desc_unpin() en lugar de otras llamadas de bloqueo/desbloqueo y añadir las etiquetas \"Fixes\" y \"Cc\" (Tvrtko); cambiar el título y el mensaje de confirmación (seleccionado del commit c088387ddd6482b40f21ccf23db1125e8fa4af7e)."
    }
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  "lastModified": "2026-06-17T08:44:26.300",
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