What’s Vulnerable › Vulnerabilities

CVE-2025-40075: tcp_metrics: use dst_dev_net_rcu()

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-28 · updated 2026-10-30

Description

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.

Affected products

• Linux: 4.13 — fixed in 6.18

How to fix

Upgrade to a fixed version: Linux 6.18. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/07613a95326ebad2d1b88d883cd72546025a4f3e
• https://git.kernel.org/stable/c/23261817e955ebeb91d7c5c667d09fa415eb88b4
• https://git.kernel.org/stable/c/4b89397807eb04986427c4786d065e9442834ad4
• https://git.kernel.org/stable/c/50c127a69cd6285300931853b352a1918cfa180f
• https://git.kernel.org/stable/c/7012bea5622396b37566fbdc059f7c6a6c279d74

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