In the Linux kernel, the following vulnerability has been resolved: vxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive().
CVE-2026-74406 · published 15 Aug 2026
How serious is it
- Severity: critical, CVSS score 9.8 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-74406?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
- Linux Linux: 4.7
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
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().
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- git.kernel.org/stable/c/08f40c0d23c67c3aa4224c3311e134999c721fb4
- git.kernel.org/stable/c/30a45c0bffdd62350261e2f2689fdba426a33578
- git.kernel.org/stable/c/4a8cde6f7281ea2c4c290f9ad9923b3631defceb
- git.kernel.org/stable/c/9c58c729d32e7cea5772cc44929c6cd61e5a31cd
- git.kernel.org/stable/c/ef44dac2a37f86eeae6b88ed10a6d60b35387dfd
- git.kernel.org/stable/c/f79c80f173fda9545b220c1f094b65fc06c252d0
Merged from NVD. Last updated 24 Oct 2026. All vulnerabilities · RSS · JSON