tcp_metrics: use dst_dev_net_rcu()
CVE-2025-40075 · published 28 Oct 2025
How serious is it
- Severity: high, CVSS score 8.1 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-2025-40075?
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: 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 to < 7012bea5622396b37566fbdc059f7c6a6c279d74, 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 to < 4b89397807eb04986427c4786d065e9442834ad4, 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 to < 07613a95326ebad2d1b88d883cd72546025a4f3e, 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 to < 50c127a69cd6285300931853b352a1918cfa180f
- Linux Linux: 4.13
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:
tcp_metrics: use dst_dev_net_rcu()
Replace three dst_dev() with a lockdep enabled helper.
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/7012bea5622396b37566fbdc059f7c6a6c279d74
- git.kernel.org/stable/c/4b89397807eb04986427c4786d065e9442834ad4
- git.kernel.org/stable/c/07613a95326ebad2d1b88d883cd72546025a4f3e
- git.kernel.org/stable/c/50c127a69cd6285300931853b352a1918cfa180f
Merged from CVE List. Last updated 25 Oct 2026. All vulnerabilities · RSS · JSON