Medium 5.5Published Feb 4, 2026

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

Updated under an hour ago (Oct 27, 2026, 6:30 PM ET)

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Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-401
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 0024d8ad1639e32d717445c69ca813fd19c2a91c before feb8243eaea7efd5279b19667d7189fd8654c87a; from 0024d8ad1639e32d717445c69ca813fd19c2a91c before ef6e608e5ee71eca0cd3475c737e684cef24f240; from 0024d8ad1639e32d717445c69ca813fd19c2a91c before 60719661b4cbd7ffbed1a0e0fa3bbc82d8bd2be9; from 0024d8ad1639e32d717445c69ca813fd19c2a91c before 59ff56992bba28051ad67cd8cc7b0edfe7280796; from 0024d8ad1639e32d717445c69ca813fd19c2a91c before ea4a98e924164586066b39f29bfcc7cc9da108cd; 0024d8ad1639e32d717445c69ca813fd19c2a91c builds before 07e9373739c6388af9d99797cdb2e79dbbcbe92b; from 0024d8ad1639e32d717445c69ca813fd19c2a91c before f7a980b3b8f80fe367f679da376cf76e800f9480	CNA record
linux linux_kernel linux:linux_kernel	from 3.9 before 5.10.249; from 5.11 before 5.15.199; from 5.16 before 6.1.162; from 6.2 before 6.6.122; from 6.7 before 6.12.68; from 6.13 before 6.18.8; 6.19; 6.19; and 4 more ranges	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.