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CVE-2023-52672

Estado: AnalizadaMedia (5.5)—

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: tubería: despertar wr_wait después de configurar max_usage Confirmar c73be61cede5 ("tubería: Agregar soporte de cola de notificaciones generales") se introdujo una regresión que bloquearía las tuberías redimensionadas bajo ciertas condiciones. Ver el reproductor en [1]. La confirmación de cambio de tamaño del anillo de tubería se movió a una función diferente, lo que movió la activación de pipe->wr_wait antes de aumentar pipe->max_usage.

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Si una tubería estaba llena antes de que ocurriera el cambio de tamaño, la reactivación nunca activaría pipe_write. Configure @max_usage y @nr_accounted antes de despertar a los escritores si no se trata de una cola de vigilancia. [Christian Brauner : reescribir en la cuenta para las colas de visualización]

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 (2)

CWE

Referencias

JSON original (NVD)

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npipe: wakeup wr_wait after setting max_usage\n\nCommit c73be61cede5 (\"pipe: Add general notification queue support\") a\nregression was introduced that would lock up resized pipes under certain\nconditions. See the reproducer in [1].\n\nThe commit resizing the pipe ring size was moved to a different\nfunction, doing that moved the wakeup for pipe->wr_wait before actually\nraising pipe->max_usage. If a pipe was full before the resize occured it\nwould result in the wakeup never actually triggering pipe_write.\n\nSet @max_usage and @nr_accounted before waking writers if this isn't a\nwatch queue.\n\n[Christian Brauner <brauner@kernel.org>: rewrite to account for watch queues]"
    },
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      "value": "En el kernel de Linux, se resolvió la siguiente vulnerabilidad: tubería: despertar wr_wait después de configurar max_usage Confirmar c73be61cede5 (\"tubería: Agregar soporte de cola de notificaciones generales\") se introdujo una regresión que bloquearía las tuberías redimensionadas bajo ciertas condiciones. Ver el reproductor en [1]. La confirmación de cambio de tamaño del anillo de tubería se movió a una función diferente, lo que movió la activación de pipe-&gt;wr_wait antes de aumentar pipe-&gt;max_usage. Si una tubería estaba llena antes de que ocurriera el cambio de tamaño, la reactivación nunca activaría pipe_write. Configure @max_usage y @nr_accounted antes de despertar a los escritores si no se trata de una cola de vigilancia. [Christian Brauner : reescribir en la cuenta para las colas de visualización]"
    }
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