What is CVE-2025-40075?

CVE-2025-40075 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 4.13 onward and patched in 6.12.63, 6.17.3 and 6.18. CVE-2025-40075 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-40075?

CVE-2025-40075 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2025-40075?

Yes, CVE-2025-40075 has been patched. Fixed versions include 6.12.63, 6.17.3 and 6.18. If you are running Linux kernel 4.13 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-40075 actively exploited?

CVE-2025-40075 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-40075

In the Linux kernel, the following vulnerability has been resolved: tcp_metrics: use dst_dev_net_rcu() Replace three dst_dev() with a lockdep enabled helper.

Package Linux Kernel

Published 2025-10-28

Last modified 2026-04-15

Patch available

Yes

Affected versions

Linux kernel versions 4.13 and later are affected. Fixed in 6.12.63, 6.17.3, 6.18 and their respective stable series.

Affected from

≥ 4.13

Fixed in

✓ 6.12.63 6.12.x ✓ 6.17.3 6.17.x ✓ 6.18

References

3 total

Frequently asked questions

What is CVE-2025-40075?

CVE-2025-40075 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.13 onward and has been patched in 6.12.63, 6.17.3 and 6.18. CVE-2025-40075 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2025-40075?

Yes. CVE-2025-40075 has been patched. Fixed versions include 6.12.63, 6.17.3 and 6.18. If you are running Linux kernel 4.13 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-40075 actively exploited?

No. CVE-2025-40075 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.