CVE-2026-23108
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: can: usb_8dev: usb_8dev_read_bulk_callback(): fix URB memory leak Fix similar memory leak as in commit 7352e1d5932a ("can: gs_usb: gs_usb_receive_bulk_callback(): fix URB memory leak"). In usb_8dev_open() -> usb_8dev_start(), the URBs for USB-in transfers are allocated, added to the priv->rx_submitted anchor and submitted. In the complete callback usb_8dev_read_bulk_callback(), the URBs are processed and resubmitted. In usb_8dev_close() -> unlink_all_urbs() the URBs are freed by calling usb_kill_anchored_urbs(&priv->rx_submitted). However, this does not take into account that the USB framework unanchors the URB before the complete function is called. This means that once an in-URB has been completed, it is no longer anchored and is ultimately not released in usb_kill_anchored_urbs(). Fix the memory leak by anchoring the URB in the usb_8dev_read_bulk_callback() to the priv->rx_submitted anchor.
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-02-04 17:16:21.673000
Last modified
2026-10-19 19:17:36.980000
View original CVE JSON
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-02-04T17:16:21.673",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: usb_8dev: usb_8dev_read_bulk_callback(): fix URB memory leak\n\nFix similar memory leak as in commit 7352e1d5932a (\"can: gs_usb:\ngs_usb_receive_bulk_callback(): fix URB memory leak\").\n\nIn usb_8dev_open() -> usb_8dev_start(), the URBs for USB-in transfers are\nallocated, added to the priv->rx_submitted anchor and submitted. In the\ncomplete callback usb_8dev_read_bulk_callback(), the URBs are processed and\nresubmitted. In usb_8dev_close() -> unlink_all_urbs() the URBs are freed by\ncalling usb_kill_anchored_urbs(&priv->rx_submitted).\n\nHowever, this does not take into account that the USB framework unanchors\nthe URB before the complete function is called. This means that once an\nin-URB has been completed, it is no longer anchored and is ultimately not\nreleased in usb_kill_anchored_urbs().\n\nFix the memory leak by anchoring the URB in the\nusb_8dev_read_bulk_callback() to the priv->rx_submitted anchor."
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"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ncan: usb_8dev: usb_8dev_read_bulk_callback(): corregir fuga de memoria de URB\n\nCorrige una fuga de memoria similar a la del commit 7352e1d5932a ('can: gs_usb: gs_usb_receive_bulk_callback(): corregir fuga de memoria de URB').\n\nEn usb_8dev_open() -> usb_8dev_start(), los URB para transferencias USB de entrada se asignan, se añaden al ancla priv->rx_submitted y se envían. En la función de devolución de llamada completa usb_8dev_read_bulk_callback(), los URB se procesan y se reenvían. En usb_8dev_close() -> unlink_all_urbs(), los URB se liberan llamando a usb_kill_anchored_urbs(&priv->rx_submitted).\n\nSin embargo, esto no tiene en cuenta que el framework USB desancla el URB antes de que se llame a la función completa. Esto significa que una vez que un URB de entrada ha sido completado, ya no está anclado y finalmente no se libera en usb_kill_anchored_urbs().\n\nCorrige la fuga de memoria anclando el URB en usb_8dev_read_bulk_callback() al ancla priv->rx_submitted."
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