What is CVE-2026-23031?

CVE-2026-23031 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 3.16 onward and patched in 5.15.203, 6.1.162, 6.6.122 and others. CVE-2026-23031 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-23031?

CVE-2026-23031 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-23031?

Yes, CVE-2026-23031 has been patched. Fixed versions include 5.15.203, 6.1.162, 6.6.122 and others. If you are running Linux kernel 3.16 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-23031 actively exploited?

CVE-2026-23031 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-23031

In the Linux kernel, the following vulnerability has been resolved: can: gs_usb: gs_usb_receive_bulk_callback(): fix URB memory leak In gs_can_open(), the URBs for USB-in transfers are allocated, added to the parent->rx_submitted anchor and submitted. In the complete callback gs_usb_receive_bulk_callback(), the URB is processed and resubmitted. In gs_can_close() the URBs are freed by calling usb_kill_anchored_urbs(parent->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 gs_can_close(). Fix the memory leak by anchoring the URB in the gs_usb_receive_bulk_callback() to the parent->rx_submitted anchor.

Package Linux Kernel

Published 2026-01-31

Last modified 2026-06-02

Patch available

Yes

Affected versions

Linux kernel versions 3.16 and later are affected. Fixed in 5.15.203, 6.1.162, 6.6.122, 6.12.67, 6.18.7, 6.19 and their respective stable series.

Affected from

≥ 3.16

Fixed in

✓ 5.15.203 5.15.x ✓ 6.1.162 6.1.x ✓ 6.6.122 6.6.x ✓ 6.12.67 6.12.x ✓ 6.18.7 6.18.x ✓ 6.19

References

The following references provide additional information about CVE-2026-23031 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Cert-Portal
https://cert-portal.siemens.com/productcert/html/ssa-253495.html
Kernel patch commit
https://git.kernel.org/stable/c/08624b7206ddb9148eeffc2384ebda2c47b6d1e9
Patch
Kernel patch commit
https://git.kernel.org/stable/c/7352e1d5932a0e777e39fa4b619801191f57e603
Patch
Kernel patch commit
https://git.kernel.org/stable/c/9c151898cc259a7784be60ba38664f42ede39b31
Patch

6 patch commits total View all on NVD

Frequently asked questions

What is CVE-2026-23031?

CVE-2026-23031 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 3.16 onward and has been patched in 5.15.203, 6.1.162, 6.6.122 and others. CVE-2026-23031 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2026-23031?

Yes — CVE-2026-23031 has been patched. Fixed versions include 5.15.203, 6.1.162, 6.6.122 and others. If you are running Linux kernel 3.16 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-23031 actively exploited?

No — CVE-2026-23031 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.