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CVE-2024-58009

Estado: ModificadaMedia (5.5)—

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

Bluetooth: L2CAP: handle NULL sock pointer in l2cap_sock_alloc

A NULL sock pointer is passed into l2cap_sock_alloc() when it is called from l2cap_sock_new_connection_cb() and the error handling paths should also be aware of it.

Seemingly a more elegant solution would be to swap bt_sock_alloc() and l2cap_chan_create() calls since they are not interdependent to that moment but then l2cap_chan_create() adds the soon to be deallocated and still dummy-initialized channel to the global list accessible by many L2CAP paths. The channel would be removed from the list in short period of time but be a bit more straight-forward here and just check for NULL instead of changing the order of function calls.

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Found by Linux Verification Center (linuxtesting.org) with SVACE static analysis tool.

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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          "integrityImpact": "NONE",
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: handle NULL sock pointer in l2cap_sock_alloc\n\nA NULL sock pointer is passed into l2cap_sock_alloc() when it is called\nfrom l2cap_sock_new_connection_cb() and the error handling paths should\nalso be aware of it.\n\nSeemingly a more elegant solution would be to swap bt_sock_alloc() and\nl2cap_chan_create() calls since they are not interdependent to that moment\nbut then l2cap_chan_create() adds the soon to be deallocated and still\ndummy-initialized channel to the global list accessible by many L2CAP\npaths. The channel would be removed from the list in short period of time\nbut be a bit more straight-forward here and just check for NULL instead of\nchanging the order of function calls.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE static\nanalysis tool."
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      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: Bluetooth: L2CAP: gestionar puntero sock NULL en l2cap_sock_alloc Se pasa un puntero sock NULL a l2cap_sock_alloc() cuando se llama desde l2cap_sock_new_connection_cb() y las rutas de gestión de errores también deberían tenerlo en cuenta. Aparentemente, una solución más elegante sería intercambiar las llamadas bt_sock_alloc() y l2cap_chan_create() ya que no son interdependientes en ese momento, pero luego l2cap_chan_create() agrega el canal que pronto se desasignará y aún tiene inicialización ficticia a la lista global accesible por muchas rutas L2CAP. El canal se eliminaría de la lista en un corto período de tiempo, pero aquí sería un poco más directo y solo verificaría si es NULL en lugar de cambiar el orden de las llamadas de función. Encontrado por Linux Verification Center (linuxtesting.org) con la herramienta de análisis estático SVACE."
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