What is CVE-2026-23037?

CVE-2026-23037 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 5.13 onward and patched in 5.15.199, 6.1.162, 6.6.122 and others. CVE-2026-23037 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-23037?

CVE-2026-23037 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-23037?

Yes, CVE-2026-23037 has been patched. Fixed versions include 5.15.199, 6.1.162, 6.6.122 and others. If you are running Linux kernel 5.13 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-23037 actively exploited?

CVE-2026-23037 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-23037

In the Linux kernel, the following vulnerability has been resolved: can: etas_es58x: allow partial RX URB allocation to succeed When es58x_alloc_rx_urbs() fails to allocate the requested number of URBs but succeeds in allocating some, it returns an error code. This causes es58x_open() to return early, skipping the cleanup label 'free_urbs', which leads to the anchored URBs being leaked. As pointed out by maintainer Vincent Mailhol, the driver is designed to handle partial URB allocation gracefully. Therefore, partial allocation should not be treated as a fatal error. Modify es58x_alloc_rx_urbs() to return 0 if at least one URB has been allocated, restoring the intended behavior and preventing the leak in es58x_open().

Package Linux Kernel

Published 2026-01-31

Last modified 2026-06-02

Patch available

Yes

Affected versions

Linux kernel versions 5.13 and later are affected. Fixed in 5.15.199, 6.1.162, 6.6.122, 6.12.67, 6.18.7, 6.19 and their respective stable series.

Affected from

≥ 5.13

Fixed in

✓ 5.15.199 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-2026-23037 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/611e839d2d552416b498ed5593e10670f61fcd4d
Patch
Kernel patch commit
https://git.kernel.org/stable/c/6c5124a60989051799037834f0a1a4b428718157
Patch
Kernel patch commit
https://git.kernel.org/stable/c/97250eb05e4b6afe787290e8fd97d0675116c61b
Patch

6 patch commits total View all on NVD

Frequently asked questions

What is CVE-2026-23037?

CVE-2026-23037 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.13 onward and has been patched in 5.15.199, 6.1.162, 6.6.122 and others. CVE-2026-23037 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2026-23037?

Yes — CVE-2026-23037 has been patched. Fixed versions include 5.15.199, 6.1.162, 6.6.122 and others. If you are running Linux kernel 5.13 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-23037 actively exploited?

No — CVE-2026-23037 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.