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CVE-2022-49729

Estado: ModificadaMedia (5.5)—

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

nfc: nfcmrvl: Fix memory leak in nfcmrvl_play_deferred

Similar to the handling of play_deferred in commit 19cfe912c37b ("Bluetooth: btusb: Fix memory leak in play_deferred"), we thought a patch might be needed here as well.

Currently usb_submit_urb is called directly to submit deferred tx urbs after unanchor them.

So the usb_giveback_urb_bh would failed to unref it in usb_unanchor_urb and cause memory leak.

Put those urbs in tx_anchor to avoid the leak, and also fix the error handling.

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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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: nfcmrvl: Fix memory leak in nfcmrvl_play_deferred\n\nSimilar to the handling of play_deferred in commit 19cfe912c37b\n(\"Bluetooth: btusb: Fix memory leak in play_deferred\"), we thought\na patch might be needed here as well.\n\nCurrently usb_submit_urb is called directly to submit deferred tx\nurbs after unanchor them.\n\nSo the usb_giveback_urb_bh would failed to unref it in usb_unanchor_urb\nand cause memory leak.\n\nPut those urbs in tx_anchor to avoid the leak, and also fix the error\nhandling."
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      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nfc: nfcmrvl: Fix memory leak in nfcmrvl_play_deferred De forma similar a la gestión de play_deferred en el commit 19cfe912c37b (\"Bluetooth: btusb: Fix memory leak in play_deferred\"), pensamos que también podría ser necesario un parche aquí. Actualmente, se llama a usb_submit_urb directamente para enviar urbs de tx diferidas después de desanclarlas. Por lo tanto, usb_giveback_urb_bh no podría desreferenciarla en usb_unanchor_urb y provocaría una pérdida de memoria. Coloque esas urbs en tx_anchor para evitar la pérdida y también corrija la gestión de errores."
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