Medium 5.5Published Feb 4, 2026

CVE-2026-23061can: kvaser_usb: kvaser_usb_read_bulk_callback(): fix URB memory leak

Updated under an hour ago (Oct 29, 2026, 5:30 AM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: can: kvaser_usb: kvaser_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 kvaser_usb_set_{,data_}bittiming() -> kvaser_usb_setup_rx_urbs(), the URBs for USB-in transfers are allocated, added to the dev->rx_submitted anchor and submitted. In the complete callback kvaser_usb_read_bulk_callback(), the URBs are processed and resubmitted. In kvaser_usb_remove_interfaces() 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 usb_kill_anchored_urbs(). Fix the memory leak by anchoring the URB in the kvaser_usb_read_bulk_callback() to the dev->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 080f40a6fa28dab299da7a652e444b1e2d9231e7 before d9d824582f2ec76459ffab449e9b05c7bc49645c; 080f40a6fa28dab299da7a652e444b1e2d9231e7 builds before 40a3334ffda479c63e416e61ff086485e24401f7; from 080f40a6fa28dab299da7a652e444b1e2d9231e7 before c1b39fa24c140bc616f51fef4175c1743e2bb132; 080f40a6fa28dab299da7a652e444b1e2d9231e7 builds before 7c308f7530bffafa994e0aa8dc651a312f4b9ff4; from 080f40a6fa28dab299da7a652e444b1e2d9231e7 before 94a7fc42e21c7d9d1c49778cd1db52de5df52a01; 080f40a6fa28dab299da7a652e444b1e2d9231e7 builds before 3b1a593eab941c3f32417896cc7df564191f2482; from 080f40a6fa28dab299da7a652e444b1e2d9231e7 before 248e8e1a125fa875158df521b30f2cc7e27eeeaa	CNA record
linux linux_kernel linux:linux_kernel	from 3.8 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/d9d824582f2ec76459ffab449e9b05c7bc49645c	patch
https://git.kernel.org/stable/c/40a3334ffda479c63e416e61ff086485e24401f7	patch
https://git.kernel.org/stable/c/c1b39fa24c140bc616f51fef4175c1743e2bb132	patch
https://git.kernel.org/stable/c/7c308f7530bffafa994e0aa8dc651a312f4b9ff4	patch
https://git.kernel.org/stable/c/94a7fc42e21c7d9d1c49778cd1db52de5df52a01	patch
https://git.kernel.org/stable/c/3b1a593eab941c3f32417896cc7df564191f2482	patch
https://git.kernel.org/stable/c/248e8e1a125fa875158df521b30f2cc7e27eeeaa	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.