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

can: esd_usb: esd_usb_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 esd_usb_open(), the URBs for USB-in transfers are allocated, added to
the dev->rx_submitted anchor and submitted. In the complete callback
esd_usb_read_bulk_callback(), the URBs are processed and resubmitted. In
esd_usb_close() the URBs are freed by calling
usb_kill_anchored_urbs(&dev->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 esd_usb_close().

Fix the memory leak by anchoring the URB in the
esd_usb_read_bulk_callback() to the dev->rx_submitted anchor.

References

• https://nvd.nist.gov/vuln/detail/CVE-2026-23075
• https://git.kernel.org/stable/c/5a4391bdc6c8357242f62f22069c865b792406b3
• https://git.kernel.org/stable/c/9d1807b442fc3286b204f8e59981b10e743533ce
• https://git.kernel.org/stable/c/a9503ae43256e80db5cba9d449b238607164c51d
• https://git.kernel.org/stable/c/adec5e1f9c99fe079ec4c92cca3f1109a3e257c3
• https://git.kernel.org/stable/c/92d26ce07ac3b7a850dc68c8d73d487b39c39b33
• https://git.kernel.org/stable/c/93b34d4ba7266030801a509c088ac77c0d7a12e9
• https://git.kernel.org/stable/c/dc934d96673992af8568664c1b58e13eb164010d