CVE-2026-23108can: usb_8dev: usb_8dev_read_bulk_callback(): fix URB memory leak

Official 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.

Affected packages & fixed versions

Affected products (as reported)

References

• https://git.kernel.org/stable/c/feb8243eaea7efd5279b19667d7189fd8654c87a
• https://git.kernel.org/stable/c/ef6e608e5ee71eca0cd3475c737e684cef24f240
• https://git.kernel.org/stable/c/60719661b4cbd7ffbed1a0e0fa3bbc82d8bd2be9
• https://git.kernel.org/stable/c/59ff56992bba28051ad67cd8cc7b0edfe7280796
• https://git.kernel.org/stable/c/ea4a98e924164586066b39f29bfcc7cc9da108cd
• https://git.kernel.org/stable/c/07e9373739c6388af9d99797cdb2e79dbbcbe92b
• https://git.kernel.org/stable/c/f7a980b3b8f80fe367f679da376cf76e800f9480