What is CVE-2026-74406?

CVE-2026-74406 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 4.7 onward and patched in 6.1.178, 6.6.145, 6.12.97 and others. CVE-2026-74406 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-74406?

CVE-2026-74406 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-74406?

Yes, CVE-2026-74406 has been patched. Fixed versions include 6.1.178, 6.6.145, 6.12.97 and others. If you are running Linux kernel 4.7 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-74406 actively exploited?

CVE-2026-74406 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-74406

In the Linux kernel, the following vulnerability has been resolved: vxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive(). udp_tunnel_sock_release() could set sk->sk_user_data to NULL while vxlan_gro_prepare_receive() is running. Let's check if rcu_dereference_sk_user_data() is NULL after skb_gro_remcsum_init().

Package Linux Kernel

Published 2026-08-15

Last modified 2026-08-15

Patch available

Yes

Affected versions

Linux kernel versions 4.7 and later are affected. Fixed in 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5, 7.2-rc1 and their respective stable series.

Affected from

≥ 4.7

Fixed in

✓ 6.1.178 6.1.x ✓ 6.6.145 6.6.x ✓ 6.12.97 6.12.x ✓ 6.18.40 6.18.x ✓ 7.1.5 7.1.x ✓ 7.2-rc1

References

6 total

Showing 5 of 6 references View all on NVD

Frequently asked questions

What is CVE-2026-74406?

CVE-2026-74406 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.7 onward and has been patched in 6.1.178, 6.6.145, 6.12.97 and others. CVE-2026-74406 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2026-74406?

Yes. CVE-2026-74406 has been patched. Fixed versions include 6.1.178, 6.6.145, 6.12.97 and others. If you are running Linux kernel 4.7 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-74406 actively exploited?

No. CVE-2026-74406 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.