What is CVE-2025-40170?

CVE-2025-40170 is a high-severity vulnerability in Linux. CVSS score: 7.8/10. Published 2025-11-12.

How severe is CVE-2025-40170?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Linux

CVE-2025-40170

In the Linux kernel, the following vulnerability has been resolved: net: use dst_dev_rcu() in sk_setup_caps() Use RCU to protect accesses to dst->dev from sk_setup_caps() and sk_dst_gso_max_size(). Also use dst_dev_rcu() in ip6_dst_mtu_maybe_forward(), and ip_dst_mtu_maybe_forward(). ip4_dst_hoplimit() can use dst_dev_net_rcu().

EPSS: 0.001 (4.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36, 4.13, 0

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67

Frequently asked questions

What is CVE-2025-40170?: CVE-2025-40170 is a high-severity vulnerability in Linux. CVSS score: 7.8/10. Published 2025-11-12.
How severe is CVE-2025-40170?: High severity. CVSS v3 base score is 7.8 out of 10.