Medium 5.5Published Feb 4, 2026

CVE-2026-23080can: mcba_usb: mcba_usb_read_bulk_callback(): fix URB memory leak

Updated under an hour ago (Oct 27, 2026, 9:20 AM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: can: mcba_usb: mcba_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 mcba_usb_probe() -> mcba_usb_start(), the URBs for USB-in transfers are allocated, added to the priv->rx_submitted anchor and submitted. In the complete callback mcba_usb_read_bulk_callback(), the URBs are processed and resubmitted. In mcba_usb_close() -> mcba_urb_unlink() 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 mcba_usb_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): Not given
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: Analyzed
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	51f3baad7de943780ce0c17bd7975df567dd6e14 builds before 8b34c611a4feb81921bc4728c091e4e3ba0270c0; from 51f3baad7de943780ce0c17bd7975df567dd6e14 before b5a1ccdc63b71d93a69a6b72f7a3f3934293ea60; from 51f3baad7de943780ce0c17bd7975df567dd6e14 before 59153b6388e05609144ad56a9b354e9100a91983; from 51f3baad7de943780ce0c17bd7975df567dd6e14 before 179f6f0cf5ae489743273b7c1644324c0c477ea9; from 51f3baad7de943780ce0c17bd7975df567dd6e14 before 94c9f6f7b953f6382fef4bdc48c046b861b8868f; from 51f3baad7de943780ce0c17bd7975df567dd6e14 before d374d715e338dfc3804aaa006fa6e470ffebb264; from 51f3baad7de943780ce0c17bd7975df567dd6e14 before 710a7529fb13c5a470258ff5508ed3c498d54729	CNA record
linux linux_kernel linux:linux_kernel	from 4.12 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/8b34c611a4feb81921bc4728c091e4e3ba0270c0	patch
https://git.kernel.org/stable/c/b5a1ccdc63b71d93a69a6b72f7a3f3934293ea60	patch
https://git.kernel.org/stable/c/59153b6388e05609144ad56a9b354e9100a91983	patch
https://git.kernel.org/stable/c/179f6f0cf5ae489743273b7c1644324c0c477ea9	patch
https://git.kernel.org/stable/c/94c9f6f7b953f6382fef4bdc48c046b861b8868f	patch
https://git.kernel.org/stable/c/d374d715e338dfc3804aaa006fa6e470ffebb264	patch
https://git.kernel.org/stable/c/710a7529fb13c5a470258ff5508ed3c498d54729	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.