What is CVE-2026-23042?

CVE-2026-23042 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 6.17 onward and patched in 6.18.6 and 6.19. CVE-2026-23042 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-23042?

CVE-2026-23042 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-23042?

Yes, CVE-2026-23042 has been patched. Fixed versions include 6.18.6 and 6.19. If you are running Linux kernel 6.17 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-23042 actively exploited?

CVE-2026-23042 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-23042

In the Linux kernel, the following vulnerability has been resolved: idpf: fix aux device unplugging when rdma is not supported by vport If vport flags do not contain VIRTCHNL2_VPORT_ENABLE_RDMA, driver does not allocate vdev_info for this vport. This leads to kernel NULL pointer dereference in idpf_idc_vport_dev_down(), which references vdev_info for every vport regardless. Check, if vdev_info was ever allocated before unplugging aux device.

Package Linux Kernel

Published 2026-02-04

Last modified 2026-04-15

Patch available

Yes

Affected versions

Linux kernel versions 6.17 and later are affected. Fixed in 6.18.6, 6.19 and their respective stable series.

Affected from

≥ 6.17

Fixed in

✓ 6.18.6 6.18.x ✓ 6.19

References

The following references provide additional information about CVE-2026-23042 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/0ad6d6e50e9d8bf596cfe77a882ddc20b29f525a
Patch
Kernel patch commit
https://git.kernel.org/stable/c/4648fb2f2e7210c53b85220ee07d42d1e4bae3f9
Patch

Frequently asked questions

What is CVE-2026-23042?

CVE-2026-23042 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.17 onward and has been patched in 6.18.6 and 6.19. CVE-2026-23042 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2026-23042?

Yes — CVE-2026-23042 has been patched. Fixed versions include 6.18.6 and 6.19. If you are running Linux kernel 6.17 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-23042 actively exploited?

No — CVE-2026-23042 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.