🛡️ CVE-2026-23080 — kernel

🟡 CVSS 5.5 — Medium ✅ No Known Exploit NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

can: mcba_usb: mcba_usb_read_bulk_callback(): fix URB memory leak

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Affected software

CVE-2026-23080 is recorded against 2 packages.

  • kernel (from 6.13.0 up to 6.18.8)
  • linux-kernel

Timeline and source

Published on 4 February 2026 and last revised on 15 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

CVE-2026-23080 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Medium
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2026-02-04
Updated 2026-08-12
Modified 2026-07-15

Affected Packages

Software From version Fixed in
kernel 6.13.0 6.18.8
linux-kernel — —

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